— 379 — 



Lasîa spinosa, (L.), Thw , Enum. PI. Zeyl., 336; Engl., Pflzrch XLVIIl 

 (IV, 23 C), Arac.-Lasioid., 24, fig 9; L. heterophylla, Schott, Melet., 1, 21 ; 

 Gen. Aroid., I, tab 82; L. aciileata, LouR., Flor. Cochinch., 81; Ind.Kew. ; 

 Dracontiiim spinosiim, L., Flor. Zeyl., 328. 



The spécimens cultivated in the Buitenzorg Gardens are distinguished 

 as follows: 



Pétiole 20—150 cm. long, equally green, aculeate; lamina of the yoiing 

 plant h istate or sagittale, of the adult plant sagittale, hastate or pedato- 

 pinnatifid with linear or lanceolate segments 15— 35 X -— 7 cm. ; basai seg- 

 ments separated by a broad or rounded sinus; primary veins (costules) 

 more or less aculeate beneath. Peduncle 20 — 50 cm long, equally green, 

 aculeate. Spathe thick-coriaceous, 15— 50 cm. long, inside carminé or purple, 

 outside black-brown or -purple; tube somewhat ventricose, open,3-7cm. 

 long, 2—2^/4 cm. broad; blade convolute, closed, very long-conoid, somewhat 

 spirally twisted, to 40 cm. long, to P/^ cm. diam., often more or less rough. 

 Spadix sessile, cylindric 2 — 5 cm. long, ± '/2~lV2cm. diam., rosy or yellow, 

 slightly attenuated towards the blunt tip, fructiferous 6-15 cm. long, 3 — 6 cm. 

 diam.; ovaries ovoid or thick-lageniform; stigma broadly pulvinuliform or 

 discoid, rather round, somewhat convex; berries thickobconoid, the apex 

 rotundate-truncate, aculeolate-verruculose, grey-green. 



Forma typica: Lamina of the adult plant cordate in outline, more or 

 less deeply pedato-pinnatifid; segments close; terminal segment broadly 

 ovate or oblong; latéral segments linear-ovate-lanceolate or -obovate-lance- 

 olate, broadest at, below or above the middle, narrowed from the broadest 

 portion towards the base and the acuminate apex, the lowest simple or 

 2-3-fid. 



Forma diversifolia : Like the type but the segments remote, linear, 

 broadest at or above the hardly narrowed base, narrowed gradually towards 

 the acute apex, the lower simple or forked, the lowest often 2- 3 fid. 



Forma simpex: Lamina hastate or sagittale, never pinnatifid even in 

 the adult plant. 



Lasîa concinna, v. A. v. R. 



Foliorum peliolus 4: 75 cm. longus, copiose sed non dense aculeatus, 

 viridis vel olivaceus, maculatus; maculae longitudinaliter elongatae, palli- 

 dissimae, subalbidae, distinctae vel in lineas horizontales vel obliquas, 

 continuas vel interruptas, irregulariter acuteque flexuosas lateraliter connatae ; 

 lamina profunde hastato-sagittata ; segmenta primaria in circuitu late oblonga ; 

 segmentum centrale ± 40 X 30 cm., profunde pinnatifidum; laciniae infra 

 lacijiiam terminalem + 3 utrinque, ±_ I2V2 — 22'/2 X 5— I2V2 cm., acutae 

 vel acuminatae, undulato-plicatae, imbricatae, basi lobis brevioribus trian- 

 gularibus vel lanceolatis separatae, superiores subintegerrimae, inferiores 

 irregulariter lobatae pinnatifidaeque; segmenta primaria lateralia (basalia) 

 centrali similia sed paullo minora et latere postico laciniis minus compo- 

 sitis vel integerrimis; venae primariae secundariaeque laeves vel parcissime 

 et indistincte verruculosae, non aculeatae. Pedunculus petiolo similis sed 



