PHILIPPINE URTICACEAE. 
497 
deeply 5-part ed, 2.5 mm long, the divisions oblanceolate to orbicular, 
their rounded apices bearing upon their dorsal surfaces spurs 0.3 ram 
long ; stamens 5, filaments 2 mm long, anthers 1 mm long. 
Glabrous, except the inflorescences, 40 cm to 3 m high; leaves with 
petioles up to 5 mm in length or shorter or subsessile, alternate but often 
with accompanying more lateral than opposite greatly reduced' leaves of 
varying outline up to 4 mm long, the lamina of normal leaves mem- 
branaceous, variable in siHfe and shape, lanceolate, oblong-lanceolate^ 
elliptic-danceolate or elliptic 1 oblanceolate, 3. to 24 cm long, 1 to 8 cm 
wide, inequilateral and usually oblique, the base acute, entire, the margin 
above the middle more often coarsely dentate or with the teeth reduced 
or wanting, the apex forming a gradually tapering straight or slightly 
falcate caudate acumen ; lateral veins 3 to 9 ; both surfaces with linear 
cystoliths. 
Mindanao, District of Davao, Davao, Copeland 900 (type) ; Mount Apo, 
Todaya, Williams 2634, Elmer 10 466 : Lake Lanao, Camp Keithley, Mrs. Clemens 
407, 430, s. n. 
Local name: dadar. 
Probably more closely allied to the next than to any. other previously described 
species. 
2. Pellionia sinuata Boerl. Handl. Kenn. FI. Ned. Indie 3 (1900) 375. 
Procris sinuata Bl. Bijdr. (1825) 511. 
Elatostema sinuatum Hassh. Cat. Iiort. Bogor. Alt. (1844) 79. 
Elatostema laeiniatum Elmer Lead. Philip. Bot; 1 (1908) 287. 
* Luzon, Province of Tayabas, Elmer 9196; Atimonan, Whitford 630 f. Samak, 
Catubig River, Merrill 5205. 
The identification is made through comparison with a sheet so named recently 
received from the Buitenzorg Botanical Garden, there cultivated, XI B (XlX) 
30. No complete descriptions seem to have . been published, the species having 
been placed by Weddell among those imperfectly known. The Philippine plants 
show great variation in leaf-size, but in all essentials seem to be quite the same. 
Java, Celebes. 
7. ELATOSTEM ATOI DES gen. nov. 
Pellioniae et Elatostemati affine; inflorescentiis haud involucratis, 
saepissime congestis, perianthio pistillifero alte quinquepartito, segmentis 
breviter vel haud acuminatis distinguendum : plantissaepe rigidis, foliis 
alternis veluno difforme valde reducto oppositis. 
To the extreme difficulty of limiting correctly the species of the Ela- 
tosterna group, there is added an equally troublesome question regarding 
the genera. This has been definitely raised by Hallier, 26 who reached 
the conclusion that the three, genera Pellionia, Procris, and Elatostema 
should be reduced to subgeneric rank under the last. He seems to confuse 
two quite different problems, whether there are three such genera with 
23 Ann. Jard. Buitenz. 13 (1896) 300-316, pi. 25-27. 
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