164 DR. O. STAPF ON THE FLORA OF MOUNT KINABALU. 
Dr. Haviland; and I find it only in a single flower in the type specimen. In this 
the few anthers which are still attached are slit from the top to the base, but the margins 
of the cell gape so much that the cell-septa are exposed, and, as the margins are more- 
over jagged, I suppose the state of these anthers is abnormal. On the other hand, we 
know certain Medinillas the anthers of which open with a short terminal slit. There- 
fore, if the anthers of P. Motleyi, Hook. fil, should indeed always open with a longi- 
tudinal slit, this would in no degree disprove the affinity of Plethiandra and 
Medinilla. The ovary is described by Sir Joseph Hooker as 4-locular. The only ovary of 
P. Motleyi which I dissected was in a rather advanced state, when the exceedingly thin 
septa are very apt to break either by the expansion of the growing fruit or by the 
slightest pressure. But, if I was not very much mistaken, it is also 6-merous. ‘The very 
delicate structure of the septa may easily account for the oversight of one or more of 
them. The placentation is also exactly as in Medinilla. 
SAMYDACEA. 
CASEARIA LEUCOLEPIS, Turcz. in Bull. Soc. Nat. Mosc. (1858) i. 463. 
On the Tawaran River (Haviland, 1388). 
Distribution: Malaya, from Java to the Philippines. 
BEGONIACE. 
BEGONIA ADENOSTEGIA, Stapf, n. sp. ($ Platycentrum). Herba epiphytica. Caulis 
gracilis, inferne induratus atque radicans, superne rubellus vel ruber, breviter cris- 
pule hirsutus. Folia petiolo, rubello crispule hirsuto, 3-5 lin. longo suffulta, valde 
oblique ovata, 3—4 poll. longa, 13-13 poll. lata, basi valde asymmetrica, unilateraliter 
cordata, in latere extus spectante in lobum magnum rotundum producta, in latere 
interiore non vel vix auriculata, apice acuminata, in margine obscure denticulata, 
firme membranacea, supra glaberrima, subtus in nervis adpresse rufo-furfuraceo- 
hirsuta, in parte exteriore nervis basalibus 3-4, altius 2-3 lateralibus additis, in 
interiore nervo solitario basali percursa, venulis imprimis supra prominulis reticu- 
lata. Stipulee ovate vel oblong:e, 3-4 lin. longze, acute vel obtuse, margine plus 
minusve glandulis brevissime crasseque stipitatis obsite, demum deciduse. Inflores- 
centia terminalis, rarius pseudolateralis et folio opposita; mascula racemosa vel 
parce paniculata, pluriflora, 11-3 poll. longa; feminea uniflora, 14 poll. longa; in 
utroque sexu pluribracteata. Bracteze opposite, cordato-ovate vel cordato-rotun- 
datze, inferiores 3 lin. longze, membranaceze, venosw, breviter glandulose Jimbriate. 
Pedicelli florum masculorum 2-1 lin. longi, femineorum demum 6-8 lin. longi. Flos 
masculus: Sepala alba rotundata, basi connata, 3 lin. longa. Petala alba 2, oblonga, 
2 lin. longa. Stamina monadelpha; filamenta imá basi connata, 1-2 lin. longa; 
antherze ovate vel oblongæ, apice emarginatz. Flos femineus: Perigonii lobi 5, 
albi, ovati, majores 4 lin. longi. Ovarium glabrum, trialatum, alis oblique obovatis 
in pedicello breviter decurrentibus ; styli 2, 1 lin. longi, iteratim dichotomi ; 
stigmata in divisionum apicibus capitata, valde papillosa ; loculi 2 ; placentee bifidze. 
