172 BULLETIN JARD. BOT. BUITENZORG, VOL. IV. LiVR. 1. 



Homalomena inccrta, V. A. V. R. 



Chamaecladon. — Herba + 30 cm. alta, caudiculo + 5 cm. longo, Va 

 cm. crasso. Foliorum petiolus gracilis, 5—10 cm. longus, + ad tertiam 

 partem vel brevius vaginatus; lamina in sicco herbacea, irregulariter oblongo- 

 elliptica, 8—12 X 3'/4— 6 cm., + in média parte latissima, apice acumi- 

 nata, breviter et graciliter apiculata, basi interdum acuta. plerumque obtusa 

 vel rotundata et imo brevissime acutata ; venae primariae + 3 -5 utrinque, 

 angulo acuto ascendentes, venis secundariis tertiariisque gricillimls interpo- 

 sitis. Pedunculi graciles, 4: 3'/2 — 4 cm. longi. Spatha elongato-ovoidea, 

 3 — 3'/4 cm. longa, ^\^ — 1 cm. ampla, acuta vel acuminata, viridis. Spadix 

 brevissime stipitatus, quam spatha multo brevior, + 174 cm. longus; inflo- 

 rescentia feminea breviter cylindrica, + 6 mm. longa et 4 mm, crassa; 

 ovaria conoideo-ovoidea, 3-locularia, ovulis placentae centrali tota longitudine 

 affixis; stigma sessile, parvum, rotundum; staminodia quam ovaria plus 

 minus duplo breviora, dimidia parte superiore obconoideo-clavata, dimidia 

 parte inferiore graciliter cylindrica; inflorescentia mascula quam feminea 

 paullo (vix) longior, + 7 mm. longa, 



This rivais H. elliptica Hk. F. in shape and size of the leaves but 

 differing totally in the spadix. 



Sumatra Ophir District, Mt. Talamau, H. A. B. BuNNEMEIJER No. 503, 

 forest, ait, 900 m,, 28 April 1917). 



Homalomena pygmaea (Hassk,), EnGL,, Pflzrch, LV (iV, 23 Da), 

 Arac-Philod.-Homal.-Schism., 34, fig. 15 — 16; Chamaecladon lanceoLatum, 

 MlQ., Flor. Ned. Ind., III, 212, tab. XL; SCHOTT, Gen. Aroid., tab. 60; 

 Aglaonema pygmaea, Hassk., Cat. Bog., 57. 



This species seems to be very variable Living spécimens cultivated in 

 the Buitenzorg Oardens and dried spécimens occurring in the Buitenzorg 

 Herbarium, determined by Engler, hâve the pétiole varying from 2 to 15 cm. 

 long, the lamina from broadly oval to relatively narrowly lanceolate, 3 — 15 

 X 1 — 6 cm., with the base acuminate to broadly rounded, the apex acute, 

 or suddenly, shortly to gradually long-acuminate, the peduncle about 2—5 

 cm. long. The spécimens are running into each other by intermediates so 

 gradually that it is impossible to draw the précise line of démarcation be- 

 tween the typical form and the varieties latifolia d.nd piimila. — See also the 

 différences in the figures and plates mentioned above. Enqler gives fig- 

 ures with ovaries in which the ovules are basai ; in SCHOTT's plate the 

 ovules are arranged along the whole placenta, etc. The living plants of 

 the Buitenzorg Gardens hâve the masculine flowers 3 — 4-androus, as in 

 H. rupicola V. A. V. R. 



Forma typica: Pétiole green, the sheath green ; lamina bright-green, or 

 reddish beneath ; spathe green or yellow-green. -- Teysmann's No. 10826 

 from Bornéo, determined by ENGLER, is H. humilis Hk. F, or a form of it. 



