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534 ROBINSON. 
30. Elatostema apoense Elmer Leafl. Philip. Bot. 3 (1910) 885. 
Dioicum, monoicum, vel floribus staminiferis pistilliferisque in eodem 
receptaculo intermixtis; bracteis exterioribus saepe inaequalibus, orbicu- 
lari-ovatis, usque ad 3.5 mm longis, obscurissime corniculatis, pilosis, 
ciliatis; bracteolis oblanceolatis, 3 mm longis, longe pilosis; floribus 
breviter pedicellatis ; perianthio staminifero 4-partito, ovato, apice longe 
ciliato; perianthio pistillifero minuto, trilobato, acheniis 0.7 mm longis: 
terrestre, succulentum, plus minusve ramosum, caulibus a basi ad apicem 
dense pubescentibus ; foliis sessilibus, laminis chartaceis, inferiorum saepe 
oblique lanceolatis, superiorum longioribus sed angustioribus, lineari-lan- 
ceolatis vel anguste lanceolatis, 3 ad 6 em longis, 2 ad 7 mm latis, basis uno 
latere acutis vel subobtusis altero rotundatis vel subauriculatis, margine 
pro rata grosse dentatis, inferioribus apice obtusis, superioribus sensim vel 
acuminatim protractis, pagina superiore glabris inferiore venis pubes- 
centibus, utrinque cystolithis notatis, trinerviis, venis 4 ad 6, subtus 
conspicuis; stipulis lanceolatis, apice protractis, 5 ad 8 mm longis. 
MINDANAO, District of Davao, Mount Apo, at 1200 m elevation, Hlmer 11793. 
This seems distinct from H#. lineare Stapf in the venation of the sessile leaves, 
and is quite different from H. rupestre Wedd., to which Stapf says that his species 
is allied. The most curious thing about this species, the presence of pistillate 
and staminate flowers in the same receptecle, is of no diagnostie value: of three 
receptacles dissected by me, one was entirely staminate, a second entirely pistillate, 
while in the third the attached staminate flowers were more central and the 
attached pistillate flowers more peripheral. 
31. Elatostema longifolium Wedd. in Ann. Sci. Nat. Bot. IV 1 (1854) 189. 
Luzon, Province of Nueva Vizcaya, Mount Umuguen, Bur. Sci. 8186 Ramos: 
Province of Laguna, Calauan, Cuming 456; Los Bafios and vicinity, Bur. Sci. 9675, 
9906, 9916 Robinson. 
On our specimen of Cuming 456 there are parts of two plants, the one with 
narrower leaves, more acutely serrate, the other with wider leaves more obtusely 
serrate: they may be different forms of the same species, but nothing has recently 
been collected to match the narrower-leaved form. The point would not be 
mentioned were it not that Weddell’s description seems to be based upon the 
narrower-leaved type, whereas all the additional collections here cited agree well 
with the broader-leaved. The leaves are oblique and very inequilateral; if the 
narrower side were as wide as the other, the most usual shape would be oval. On 
this conception of the limits of the species, it approaches closely to B. ulmifolium 
Miq., reduced by Weddell to varietal rank under BK. sessile, but with leaves of 
thicker texture, having the serrations fewer and much less closely set, A still 
nearer match is Dr. King’s collector 521, from Coping in the Malay Peninsula, 
named as H. sessile, differing chiefly in the nature of the pubescence and less 
definitely in the texture of the leaves and the stipules. It is very much nearer 
to any of the Indian and Javan specimens in this collection named as FE. sessile 
than is HZ, brongniartianum, which Weddell made a variety of that species. Ignor- 
ing here generic questions, discussed elsewhere, it may be worth while to discuss 
the validity of the name £. sessile. The entire specifie diagnosis,” the first 
species being a Procris, is “Sessile. 2 E. tetrandrum.” In the Prodromus (1786), 
* Forst. J. R. & G. Char. Gen. Pl. (1776) 106. 
