MEXICAN AND CENTRAL AMERICAN SPECIES OF SAPIUM. 165 
ate on the margin; floral spikes in terminal clusters of 3 to 5, androgynous or some- 
times only staminate; floral glands discoid or transversly elliptic; pistillate flowers 
pedicellate, 5 to 7 at base of spikes; the bracts scarious, broadly cordiform, the calyx 
greenish yellow, closely contiguous to the ovary, with two acute tips, the ovary ovoid 
with a short style and smaller, nearly erect, exserted stigmas; staminate flowers 6 or 
7 in each cluster, pedicellate, the calyx divisions oval, pale yellow; stamens long- 
exserted; filaments thick, cla- 
vate; anthers small, reniform, 
pale yellow or tinged with pur- 
ple; capsule and seeds not 
known. 
Josta Rica: Hacienda Valverde 
at Orosi, altitude 1,200 meters, 
H. Pittier, March, 1902, flowers a b Cc a 
(Inst. fis.-geog., Costa Rica, no, Fig, 8.—Sapium anadenum. a, Immature pistillate flower; 
16366; U.S. National Herbarium, b, pistil; c, staminate flower; d, stamens, 
no. 578045, type). 
These specimens were placed with S. pachystachys by Professor Schumann, but they 
differ widely from that species in the form and texture of the leaf, their clustered 
spikes, and the characters of the pistillate flowers. I would rather place it near 
S. pleiostachys, with which it may prove identical upon examination of more complete 
material. 
3. Sapium mexicanum Hemsl. in Hook. Ic. PL TV. 27: pl. 2680. 1901. Puare XII. 
‘‘An entirely glabrous tree, the fructiferous branchlets being rather thick and 
smooth; leaves long-petiolate, coriaceous, flexible, pale green, oblong-lanceolate, 10 
to 20 em. long, including the petioles, and up to 3.5 em. broad [petioles 2.5 to 3.5 
cm., leaf blades 6 to 12 em. long, 2.5 to 3.5 cm. broad, as seen by me.—H. P.], sub- 
obtuse and eglandular at the apex, cuneate or rounded at the base; margin minutely 
ceallous-crenate in its whole length; primary lateral veins numerous, slender, 
curved, obscurely connected near the margin; petioles slender, 2 to 38cm. long, with 
2 thick, subglobose glands at the summit; stipules broad, squamiform, long- 
persistent; spikes androgynous, simple, terminal or pseudoterminal, solitary, longer 
than the leaves; bracts small, provided with peltate, oval, geminate glands; pistil- 
late flowers 3 or 4 at the base of the spikes, solitary in the axils of the bracts, sessile, 
the remaining flowers staminate, in clusters of 9 to 12 under each bract; styles free 
from the base, thick, recurved, soon deciduous; capsules very shortly pedicellate, 
ligneous, subglobose, loculicidally dehiscent from a persistent axis, about 38 mm. 
in diameter when expanded, the valves at length very spreading, long-persistent; 
seeds ovoid, 10 to 13 mm. long [8.1 to 8.2 mm. long, 6.1 to 6.2 mm. thick, as seen 
by me.—H. P.], slightly corrugated under the cinnabar-red testa; embryo central; 
cotyledons orbicular.’’—Hemsley, loc. cit. 
Mexico: Lava fields near Cuernavaca, Morelos, altitude 1,500 meters, C. G. Pringle, 
no. 6336, June 17 and September 23, 1896, flowers; C. G. Pringle, no. 13195, June 8, 
1904, flowers and fruit; E. W. D. Holway, no. 3517, September 28, 1899, fruit (Gray 
Herbarium). Huber“ has suggested the substitution of the name S. macrocarpum 
Sw. for S. mexicanum Hemsl. But I do not feel altogether convinced that the short 
and incomplete description of Swartz applies more to the very complete materials 
of the species collected by Pringle and Holway than to Huber’s new species, 8. 
pedicellatum. In view of the doubt, I find it advisable to maintain Hemsley’s name. 
Until better material has been supplied, Sapiuwm lateriflorum Hemsl.? must be con- 
sidered as a species of doubtful standing. Hemsley himself hesitates as to the 
4Bull. Herb. Boiss. II. 6: 352, 1906. 
> Hook. Ie. Pl. IV. 27: under pl. 2680. 1901. 
