VNƯ Journal of Science, N atu ral Sciences a n d Technology 23 2007 86-90Two new species of the genus Arisaema Mart.. Both of th em belong to the section Fim briata follow ing M u ra ta'
Trang 1VNƯ Journal of Science, N atu ral Sciences a n d Technology 23 (2007) 86-90
Two new species of the genus Arisaema Mart (Araceae)
described for Flora of Vietnam
N guyen Van Du *
I n s titu te o fE c o lo g y a n d B iological R esources, V ietn a m ese A c a d e m y o f S cien ce and T echnology
18 Hoang Quoc Viet, Hanoi, Vietnam
R eceived 10 A u g u s t 2006
A b stra c t Arisaema omkoiense G u s m a n a n d A ramulosum A ndervv h a v e b e e n d esc rib ed a s nevv
re co rd for Flora o f V ietn am A m o n g th em , Arisaema omkoiense w a s fo u n d in C h ien g M ai (T hailan d )
recen tly by G u sm a n , novv re c o rd c d in C e n tre V ietn am (Q u a n g T ri a n d K o n tu m prov.) T he o th e r
One, A ramulosum A ndervv a n e n d e m ic of In d o n e sia for lo n g tim e, h as b een fo u n d in N o rth e rn
V ietn am (C ao B ang a n d Bac C a n p rov.).
1 In tro d u c tio n
The g enus Arisaema c M art (Araceae
Juss.) includes a b o u t 170 species [1] They are
d istrib u ted m ainly in A sia a n d few species
there are in E a st-N o rth ern A írica and
N o rth ern A m erica [2] Beíore, this g en u s w as
recorded w ith 5 species b elo n g in g to 2
sections in V ietnam [3-6] R ecent stu d ie s [7-9]
ha ve recorded 16 species of th is g en u s k n ow n
in Vietnam AU of th em b elo n g to 4 sections
(follow ing M u ra ta's co n cep t [5]) o r 5 sections
(follow ing G usm arTs co n cep t [10]) Base on
the M u rata's system [5], a m o n g V ietnam ese
species, 12 species b elo n g to the section
ỉimbriata, 2 species b elo n g to th e section
Decipientia, 1 species b elo ng to the section
Franchetiana and 1 species b elo n g to the
section Sinarisaema.
In this p aper, the a u th o r describes tw o
species A omkoiense G u sm a n an d A.
* Tel.: 84-4-8360169
E-mail: Vandu@ iebr.vast.ac.vn
ramulosum Aldrervv fo u n d V ietnam recently
Both of th em belong to the section Fim briata (follow ing M u ra ta' concept) The first time,
bo th species are described from m aterials
collected in V ietnam The first species, A
G usm an from the ty p e specim ens collected from C hiengm ai (Doi Inthanon) of T hailand [1] F ollow ing G usm an, this species are
d istrib u teđ vvidely from South-W est of China
to T hailand and V ietnam Base on the com parison betw een the m aterials collected
in H u o n g H oa (Q uang Tri prov.) and in Ngoe Linh m o u n ta in (K ontum prov.) and the original d escription, ty p e specim en as well as discussion directly b ehveen the au th o r and Prof G u sm an in his house in Bruxsell, the
species A omkoiense has been recorded for
Flora of V ietnam
In the ex peditions in T hang H en (Cao Bang prov.) an d Babe lake (Bac Can prov.)
th at vvere carried o u t th e a u th o r and Mary Sizem ore (Plorida, USA) an d John Tan Hoew
(Singapore), a species of Arisaema genus was
Trang 2N g u y en Van D u / VblU Ịournaỉ o f Science, Natural Sciences and Technology 23 (2007) 86-90 87
coilected T h ro u g h m orphological analyses,
vve recognized th at the characters of this
species com pletely fit to the species A
su rp rised us because A ramulosum vvas an
endem ic species of Indonesia for long time
b u t now it has been íound in N o rth ern
V ietnam vvhere is sep arated from Indonesia
not only by distance b u t also by sea
Hovvever the identiíication vvas coníirm ed
w hen type specim ens of A ramulosum
checked by the au th o r in Borgo h erb ariu m
(BO) in N ovem ber, 2005 and m any
discussions betvveen the au th o r and super-
specialist of this g enus in vvorld
2 D escrip tio n of n ew species
1 A risaem a o m k o ie n se G usm an 2001
Syst Geogr Pl 71: 3; id 2003 Arisaema Mon
Bot Mat Lov 83
R hizom atous herbaceous plant, c 60 cm
tall Rhizom e short, 1.5-3 cm long, c 1 cm in
diam C ataphylls em brace petiole and
p e d u n c le separately, 1 a ro u n d petiole, 2
aro u n d peduncle, inside One longer than
outside, c 13 cm long Leaf 1-2; petiole 56 cm
long; leaf blade triíoliate; leaf lobes vvith
stipitates, 1.5 ơ n long at lateral lobes and 3
cm long at Central lobe, ovate to nearly
elliptic shape, 22-24 cm long, 14-15 cm w ide,
base ro u n d ed at lateral lobes and obtuse at
Central Iobes, apex acum inate; lateral veins 9-
10 pairs, conspicuous, collective vein d istan t
3-7 m m from m argin P eduncle 13.5-20 cm
long, m ore sto u ter th an at íem ale
inílorescence; sp ath e 7-9 cm long, pale green,
w hite at base; tube portion hm nel shape, 4-5
cm long, c 2 cm vvide at m outh, m outh
m argin lightly recurved; sp ath e lam ina
shorter than tube portion, trian g u lar form,
3-4 cm long, acu m in ate 2-3-4 m m long; m ale
sp ad ix 4.5 cm long, íertile p ortion cylindrical, 1.7 cm long, fIow ers in loose arrangem ent,
a p p en d ix lightly conical, from base to apex covered d en sely by slen d er filiform steriles;
m ale flow ers consisted by 2-3 stam ens, stam en s w ith a sh o rt stipitate, 0.5 m m long,
a n th ers subglobose, deh iscen t by pore at apex, íilam en t d ep ressed , base attenuate,
u p p e r n a rro w trian g u lar, apex elongated into
an acu m in atio n ; bisexual sp ad ix 6 cm long; íem ale p o rtio n cylindrical to lightly conical, 1.8 cm long, ovaries loose in arrangem ent, ovaries sub g lo b o se to sp in d le shape, truncate
at apex, stig m a d o t íorm , penicillate, not rarely se rra te d disciíorm (in m aterial VH 070), style sh o rt conical; m ale p o rtio n c 8 m m long, few íem ale in loose arrangem ent, 2 stam en s g ro u p in 2, íilam en t 1.5 m m long, connected to g eth er a t 0.5 m m , u p p e r portion
d iv id ed , c 0.3 m m long, apex elongate in
su b u late form , c 0.3 m m long; ap p en d ix rath er sto u t, lightly conical, 2 m m w id e at base, d en sely covered vvith filiform steriles from base to apex
Typus: Thailand, Q ìiengm ai prov., near
Omkoi, G usm an GG00013 (holo BR (original type pictures!); iso BKF)
Habitat: P rim ary and secondary board-
leaved e v erg ree n su b -m o u n tain íorest on
v ery stee p rocky shale Southern slopes of Sa
M ui m o u n ta in ; 1200-1300 m alt
K ontum ), T h a ilan d (Chiengm ai)
Materials exampled: Q u an g Tri prov.,
H u o n g H oa d istr., H u o n g P hung
m u n icip ality , P.K Loc et al HLF 5863 (HN)
K on T u m prov., N goe Linh m ountain,
A veryanov & others VH 070 (HN, p, LE, MO)
Discussion: In the original publication of
A omkoiense, G u sm an co m p ared this species
Trang 38 8 N g u y e n V a n D u / V N U Ị o u r n a ỉ o f S c ie n c e, N a tu r a l S c ie n c e s a n d T e c h n o lo g y 2 3 ( 2 0 0 7 ) 8 6 - 9 0
to other triíoliate species as A garrettii, A
pingianense, A petelotii, an d A balansae and
gave the different characters betvveen species
Hovvever, the au th o r find th at A omkoiense is
closest to A petelotii by h aving spadix not or
hardly exserted from sp ath e tube, along
spadix appendix covered by filiform sterile
ílovvers A omkoiense is d iííere n t from A
petelotii by not having p seudostem , stam ens
vvith a sh o rt stipitate, connectives subulate,
cross over anthers
2 A risaem a ram u lo su m A lderw 1922
Bull Jard Bot Buitnezorg 3(4): 166; G usm an,
2003 Arisaem a M on Bot M at Lov 181
H erbaceous tu b ero u s m onoecious plant,
9-30 cm tall, usually sm all in m ale plants
Tuber subglobose, 0.5-4 cm in diam , light
brow n o u t side, vvhite in side Leaf solitary;
petiole 9-30 cm long, pale to d ark som etim e
d irt green, low er p ortion created into
pseudostem 5-15 cm, free portion 4-15 cm
long; leaf blade triíoliolate, lobes d ark green
on suríace and paler at u n d e r suríace, glossy;
lateral lobes subsessile, lanceolate ovate,
7.5 - 12 cm long, 4.5 - 6.2 cm vvide, oblique,
ba se obtus to round, apex acum inate 1-1.5 cm
long, tip arista; Central lobe vvith a stipitate,
ovate lanceolate, 7-14 cm long, 4-8 cm vvide,
base cuneate, obtus to ro u n d , apex acum inate
w ith short arista at tip P eduncle equal,
shorter or little longer th an free portion of
petiole, 7-12 cm long, pale green or brow n
w ith w hite rouges; sp ath e long 5-8 cm long,
tube cylindrical, 2-4 cm long, c 1 cm vvide,
w hite to pale green or little pu rp lish , m ottled
and w ith longitudinal, d ark p u rp le stripes,
inside w hite; m o u th m argin green and hard ly
recurved; sp ath e lam ina triangular, 3-4 cm
long, outside dull, pale green, glossy, w ith
dark stripes and ílu sh ed p u rp le near
m argins, w ith d a rk green cross b an d at base,
apex acum inate; m ale spadix 2.5 cm long
w ith a sh o rt stipitate, stipe c 2 m m long, íertile p o rtio n conical, 1.2 cm long, rather dense flowers/ appendix subulate íorm, c 2 cm long, d a rk green w ith b ro w n strips, covered
w ith several purple, filiform sterile flow ers at base and apex; m ale flow er g ro u p ed in 2 stamensy sessile, an th ers dehiscence by lateral slit; íem ale spadix 4 cm long, íertile portion slightly conical 8 m m long, 5 m m vvide at base, ap p en d ix the sam e in m ale spadix, a little thicker, c 3 cm long, 1.5 m m thick at base; ovaries bottle sh ap e, size 1.5 X 1 mm, stigm a sp o t íorm , style absent
Typus: Indonesia, Java J.J Sm ith 775
(BO!)
Habitat: The plants grovv in the gaps of
rocks, u n d e r sh ad e Broad leaf evergreen prim ary íorest on lim estone m ountain
N o rth ern Vietnam
Materials exampled: C ao Bang prov.y Tra
Linh distr., Q uoc T oan com m unity, Thang
H en lake, A veryanov et al V H 4873, 4874 (HN, LE), N gu y en V an D u 404 (HN)
Discussion: In the section Pimbriata, 3
species h av e sp ath e h a v in g d a rk cross b m d
at base of sp ath e lim e as A ramulosum A
penicillatum and A ỉaminatum A ramuloìum
distin g u ish ed from A peniciỉlatum by its
sp ath e tu b e vvhitish, eq u al or shorter than lam ina portion, w ith o u t w hite area betvveen tube an d lam ina A ramulosum also
distin g u ish ed from A ỉaminatum by its
ap p en d ix sto u t su b u late, vvith few sterile flow ers loosely arran g ed at base and apex
Reíerences
[1] G G u sm a n , A risaem a o m k o ie n se (Aracea?)/ a
n ew sp ecies d e sc rib e d from N o rth T h aih n d ,
Syst Geogr Pl., B clgium 71 (2001) 3.
Trang 4N g u y ê n V a n D u / V N U Ị o u r n a ỉ o f S c ie n c e , N a tu r a l S à e n c e s a n d T e c h n o lo g y 2 3 ( 2 0 0 7 ) 8 6 -9 0 89
[2] S.J M ayo ct al., The genera o f Araceae, K ew publ.,
London, Kevv, 1997.
(3| F G a g n ep ain , Araees Flore Générale de rindỡ-
Chine, 6 (1942) 1075.
[4| C.R.W.K A ld e rw e re lt/ N e w o r N otevvorthy
M alayan A raceae 2 Bull Ịard Bot Buitenzorg
ser 3, 4(1) (1962) 163.
[5] J M urata, ^ u r n , A n A tte m p t a t a n In írag en eric
C lassiíication of th e G e n u s A risa e m a (A raceae)
Faculty Sà U n i v e r s T okyo, sect.3, 13 (1984) 431.
[6] P ham H o a n g Ho, Araceae Ịlỉustrations fo r Fỉora of
Vietìtam, vol 3, book 1 (1993) 416, M ontréal (in
V ietnam ese).
[7] N g u y e n V an Du, T hrce nevv records of the
g en u s A risaem a (A raceae) for Flora of V ietnam
a n d th e ir m e d iđ n a l valu es, Ịournaỉ o f Mat Med.,
7 (2002) 69.
[8] N g u y e n V an D u, O n e nevv species of th e g en u s
A risa em a c M art (A raceae) for the Flora of
V ietnam , Ịoum ofBiol 26 (2004) 54.
[9] N g u y e n V an Du, p.c Boyce, T w o N ew Species
of T he G e n u s A risaem a (A raceae: Arisacmateae)
from N orthern Vietnam, Folm Míỉhĩysừtrm 6 (2005) 35 [10] G G u sm a n , G L iliane, The genus Arisaema Publ
House A.R Gantner Verlag Mommanditgeseilschaít
FL 9491, R uggeỉl G erm an y , 2003.
Plate: A risa e m a o m k o ie n s e G u sm a n P ictures: A risa e m a ra m u lo s u m A ld erw
2 Habit; 2 Spíĩthe; 3 Female spadix; 4 Male spadix; H a b it a n d íem al spadix.
5 variation o f maỉeỊĨoĩvers; 6 Ovary (P hoto: N g u y e n V an Du).
Trang 590 N g u y e n V a n D u / V N U Ị o u m a ỉ o f S c ie n c e , N a tu r a l S c ie n c e s a n d T e c h n o lo g y 2 3 ( 2 0 0 7 ) 8 6 - 9 0
Mô tả 2 loài mới thuộc chi Arisaema Mart (Araceae)
Nguyễn Văn Dư
Viện Sinh thái và Tài nguyên Sinh vật, Viện Kỉtoa học và Công n%hệ Việt Nam
18 Hoàng Quôc Việt, Hà Nội, Việt Nam
Lần đầu tiên 2 loài mới thuộc chi Arisaema được m ô tả cho hệ thực vật Việt N am từ n h ữ n g
m ẫu vật mới thu được gần đây Đó là Arisaema omkoiense G u sm an và A ramulosum A lderw Cả 2
loài đều thuộc section Fim briata (dựa theo hệ thông cùa M urata, 1984) với các đặc điếm phiến lá
xẻ 3 thuỳ, phần ph ụ ít nhiều m ành, không có cuống, ít nhiều có các hoa bâ't thụ d ạn g sợi
Trong 2 loài, Arisaema omkoiense G usm an râ't gần với A petolotii vì bông nạc th ư ờ n g ít nhô ra khói ông mo, toàn phần phụ đư ợc bao phủ bởi các hoa bất thụ T uy nhiên nó khác với A petelotii
vì thư ờng chi m ang 1 lá, không có phần thân giả, nhị có ph ần Iru n g đới kéo dài hình dùi, ngắn
A ramolusum trước đây chi đư ợc biết có ở Inđônêxia 0 a v a )/ n a y lại tìm thây ở Việt Nam Đây
là lần đ ầu tiên loài này đư ợc p h át hiện có ở ngoài khu p h ân bô' của nó Loài này râ't gần với các
loài A ramulosum, A penicilỉatum and A lam im tum vì phiên m o đểu có m ột dải m ầu xanh đậm ờ gô'c N hư ng A ramulosum p h ân biệt với A penicillatum do có ốn g m o m ầu trắng, dài bằng hoặc ngắn hơn phiến mo, không có khoảng trắng giữa ông m o và p h iến mo A ramulosum cũng phân biệt với A laminatum do có p h ần ph ụ hình d ùi m ập và ít hoa bâ't thụ xếp ớ gôc và đ ỉn h phần phụ (hình dùi m ảnh, không có hoa bất thụ ờ A ỉaminatum).