250 PROCEEDINGS OF THE AMERICAN ACADEMY. 
hirsute to nearly glabrous, inconspicuously hispidulous along the an- 
gles: leaves in fours, elliptic-oblong to subobovate, 0.5 to 1 em. long, 
one-half to two-thirds as broad, abruptly short-acuminate, acutish, spar- 
ingly hirsute on both surfaces, entire, ciliate, often somewhat revolute- 
margined, narrowed below to a subpetiolate base, 3-nerved, punctate 
with oblong pellucid glands: inflorescence an elongated many-headed 
cymose panicle; lateral branches of the inflorescence dichotomously 
branched ; bracts small; pedicels 1 to 14 mm. long, glabrous: flowers 2 
to 3 mm. high: calyx-limb obsolete: corolla rotate-campanulate, about 
2mm long, 4-dentate to the middle; lobes ovate, acute: mature fruit 
didymous, 1.5 mm. long, 2 mm. broad, pubescent with upwardly incurved 
or subappressed uncinate-hispid hairs; the two halves of the fruit often 
separating or diverging at maturity.— Mexico. State of Hidalgo: 
hanging from wet cliffs and banks, barranca below Trinidad Iron Works, 
altitude 1585 m., 6 May, 1904, C. G. Pringle, no. 8985 (hb. Gr.). The 
pendulous habit, quaternate leaves, elongated paniculate cyme with its 
spreading dichotomous branches, and the upwardly subappressed-hispid 
fruit abundantly characterize this species, and enable one to readily 
recognize it among all the other species of the genus. Its affinity is with 
G. Pringle’, Greenm., on the one hand, and G. uncinulatum, DC., on the 
other. . 
Relbunium mazocarpum, n.sp. Stems prostrate or reclining, slen- 
der, 2 to 30 cm. long, glabrous; internodes longer or shorter than the 
leaves: leaves in fours, ovate-elliptic to elliptic-lanceolate, 1 to 5 mm. 
long, one-half as broad, terminated by a deciduous setiform mucro, en- 
tire, sparingly hirsute above, glabrous beneath: inflorescence axillary: 
peduncles slender, 4 mm. or less in length, 2-bracteate above ; bracts 
opposite, similar to the leaves but smaller: flowers short-pedicellate: 
calyx-limb obsolete: corolla rotate, less than 2 mm. in diameter ; lobes 
ovate, acute, externally bearing a few stiff hairs : ovary and mature fruit 
densely papillose-roughened, in the dried state appearing somewhat scaly. 
— Mexico. State of Hidalgo: moist banks, barranca below Trinidad 
Tron Works, altitude 1675 m., 6 May, 1904, C. G. Pringle, no. 8834 
(hb. Gr.). Related to R. sphagnophilum, Greenm., and R. humile, 
Schum., but differs from the former in being pubescent on the upper 
leaf-surface and in having a papillose-roughened instead of glabrous and 
smooth fruit; from the latter species it differs in having a papillose m- 
stead of pubescent fruit. 
Viburnum caudatum, n. sp. Shrub or small tree, 4 to 6 m. high: 
stem and branches covered with a reddish brown cortex, subterete; 
