Robinson and Greenman—Mexican Plants. 151 
ter 1} to 2 inches long; pedicels less than a line in length: sepals 
green, oblong, obtusish, 14 lines long: petals lanceolate-attenuate, 
24 lines long: scales short and broad, truncate: stamens 10 : car- 
pels 5, united a third of their length, attenuate, many-ovuled, as 
long as the petals.—Collected by C. G. Pringle, on limestone 
ledges, Las Cuevas, San Luis Potosi, 30 October, 1891 (No. 5101). 
Habit of S. Bourgwi Hemsl. and from the character also of S. 
Guatemalense Hemsl. From the former it differs in its shorter 
sepals and shorter and much broader scales: from the latter in its 
much shorter pedicles, smaller flowers, and broader leaves. 
PassIFLORA PRINGLE Stem angulate, hispid with dark col- 
ored hairs: tendrils none: leaves 5-lobed to the middle, some- 
what narrowed at the base, about 2 inches in diameter, finely 
pubescent above, paler beneath and sparingly pubescent upon the 
prominent reticulated veins; lobes ovate, acutish, finely ciliated, 
entire or more frequently sharply few-toothed; the middle lobe 
bearing upon the under surface near its base two small round 
sessile glands; petioles ascending, 6 to 9 lines long, hispid, bear- 
ing two stipitate glands at the summit; stipules lanceolate, acu- 
minate, falcate, 2 lines long : peduncles somewhat exceeding the 
petioles, hispid, bearing 2 to 3 successive linear attenuate bracts 
and a single terminal flower (2 inches in diameter): calyx-tube 
broadly campanulate; lobes oblong-lanceolate, acute, 10 lines 
long, 3 lines broad, greenish white in a dried state: petals oblong- 
lanceolate, two-thirds as long as the sepals: outer crown of fila- 
ments free to the base, exceeding the petals; the middle crown 
membranous, plicate, inflexed, covering two inconspicuous inner 
rings: gynandrophore 5 lines long, glabrous, destitute of any 
fleshy urceola.—Collected by C. G. Pringle, on hills uear Patz- 
cuara, Michoacan, 23 July, 1892 (No. 5268). 
PIQUERIA SERRATA Gray, var. ANGUSTIFOLIA. Shrubby, 3 to 6 
feet high: leaves oblong-lanceolate, finely and rather remotely 
crenate-serrate, 4 to 5 inches long (including short petiole), 6 to 
10 lines broad, gradually narrowed at the base.—Collected by C. 
G. Pringle, on the Sierra de San Felipe, altitude 9,500 feet, 24 
September, 1894 (No. 4827).— With habit and floral characters of 
the type but differing rather strikingly in the outline and serra- 
tion of the leaves. 
OAXACANIA n. gen. of Composite (Ageratee). Heads homo- 
gamous, many-flowered. Involucre campanulate ; bracts 4—5-seri- 
ate, 3-nerved, the outer shorter. Receptacle convex, chaff-bear- 
ing throughout. Corollas equal, regular, purplish, with slender 
tube, somewhat dilated above, and 5-toothed limb. Pappus obso- 
lete or an inconspicuous crown of minute teeth. Achenes linear- 
oblong, 5-angled and rather strongly compressed laterally.— 
Bushy herbs or suffruticose. Leaves alternate, petiolate, dentate, 
palmately-nerved. Heads corymbose-paniculate, about 100-flow- 
ered. 
O. MaLv Fora. Densely and viscidly glandular-pubescent : 
stems branching, 3 to 4 feet long, very leafy: leaves varying 
