Robinson and Greenman—Mexican Plants. 155 
ENcCELIA (§ GER#A) HYPARGYREA. Shrub, 5 to 15 feet high: 
branches terete, striate, scabrous-pubescent: leaves opposite except 
the uppermost, ovate, acute or somewhat acuminate, cordate, obso- 
letely or more or less distinctly serrulate, thickish, densely gray- 
tomentose above, appressed sericeous-pubescent and silvery below, 
3-nerved, 2 to 23 inches long, three-fourths as broad; margins 
somewhat revolute; petioles about half inch long; floral leaves 
ovate-lanceolate, subsessile: heads corymbose, about 6 to 8 lines 
in diameter excluding the oblong yellow rays: the latter 10 to 12 
in number: involucre campanulate; scales 2—3-seriate, oblong- 
linear, obtusish, roughish pubescent: chaff of the disk carinate, 
oblong, sub-3-dentate, puberulent: achenes 13 lines long, densely 
sericeous-pubescent.—Collected by C. G. Pringle, in La Hoya 
Cafion, Oaxaca, altitude 3,000 feet, 2 November, 1894 (No. 6142). 
Ence iia (§ GER#A) GLUTINOSA. A tall branching shrub, 10 to 
15 feet high: branches covered with a roughish gray bark, some- 
what white-woolly near the leaf-bearing summits: leaves alter- 
nate, approximate, short-petioled, ovate-lanceolate, acuminate, 
entire, nearly glabrous, but slightly papillose-scabrous, and 
almost lucid above, pubescent and not paler beneath, obtusish or 
scarcely acute at the base: 3 to 4 inches long, 15 to 16 lines 
broad; petioles densely pubescent, 3 lines in length: inflores- 
cences terminal, corymbose, rather dense; heads nearly half inch 
in diameter (exclusive of rays), 7 lines in length, vernicose: invo- 
lucre 2—3-seriate with the outer scales much shorter; scales thick, 
obtusish, somewhat striated: rays about 8, bright-yellow, fully 
half inch long: achenes linear-oblong, 4 lines in length, 2-awned, 
pubescent, and silky-ciliate.-—Collected by C. G. Pringle, in La 
Hoya Cafion, Oaxaca, altitude 4,000 feet, 2 November, 1894 (No. 
6024). 
ease (§ GER#ZA) RHOMBIFOLIA. Decumbent, densely pilose- 
pubescent with spreading white hairs, leafy to the middle: leaves 
(except the reduced uppermost) opposite, rhombic-ovate, acutish, 
harsh in texture, scabrous and tuberculate-hispidulous above, 
scarcely paler but more densely and softly pubescent and with 
frequent argenteous blotches beneath, serrate from below the 
middle, 3-nerved from above the base, 2 inches long, 12 to 15 
lines broad, narrowed in the upper leaves to a sessile somewhat 
-amplexicaul base, the lower short-petioled: inflorescence loose 
and irregular; heads half inch in diameter, short-peduncled, borne 
in irregular subracemose groups, 2 to 5 together at the ends of the 
almost naked branches: scales of the involucre 2—3-seriate, oblong- 
lanceolate, attenuate, grayish hirsute, the outer shorter: rays 8, 
yellow, 34 lines long: achenes flattened, appressed-pubescent, cil- 
iate on the edges; awns 2, with intermediate scales.—Collected 
by C. G. Pringle, on dry calcareous hills, Las Sedas, Oaxaca, 
altitude 6,000 feet, August, 1894 (No. 4813). 
LErTrosyNE PriINGLEL Rootstock short-oblong, thickish and 
woody; stems several, decumbent, simple and leafy nearly to the 
middle, a foot or more high, striate-angulate, puberulent below: 
