178 PROCEEDINGS OF THE AMERICAN ACADEMY 
diameter; rays elliptic, 3-toothed, 2-3 lines in length. — Alkaline 
plains, Hacienda de Angostura, San Luis Potosi, June, 1891 
(n. 3762). 
FLAVERIA ANOMALA. A glabrous annual, a span high: stem stri- 
ate-angulate, much branched: Jeaves linear or lance-linear, grad- 
ually narrowed to a slightly connate base, acute, 14-2 inches long, 
1}-2} lines wide: heads numerous, aggregated at the ends of the 
branches in dense corymbs, very small, subtended by minute dark- 
tipped bracts, 1- (rarely 2-) flowered; the single flower either tubular 
or ligulate: involucral scales of unequal breadth, lance-linear or 
oblong, more or less narrowed but obtuse at the apex, persisting in 
fruit and becoming swollen and bulbous on the back near the base: 2 
corollas bright yellow; in the tubular flowers the campanulate 2 
throat and spreading limb equalling the tube, the latter hairy om 
the outer surface; the ligules a line or less in length: achenes 
oblanceolate, ribbed, black. — Plains, Vanegas, San Luis Potosi, 
September, 1890 (n. 3669). This interesting plant was first col 
lected by Dr. C. C. Parry in Northern Mexico, 1878 (n. 31), and 
again the same year en route from San Luis Potosi to San Antonio, | 
‘Texas (n. 500); but Dr. Parry’s specimens were determined (prob a 
ably by Mr. Hemsley) as F. linearis, Lag. ‘‘forma morbida.” Dr | 
Gray noted the specimens as a new species, but appears never to have a4 
described them. Mr. Pringle’s plants, collected twelve years latet | 
and agreeing closely with Dr. Parry’s, seem to show that they rep | 
resent a permanent species, and not merely a casual form. In its | 
very few-flowered heads this species approaches F. repanda, Lage | 
Poropuytium Prineter. A smooth pruinose annual, 1}-2 feet | 
in height: stem terete, simple below, branching above: leave? — 
elliptic, subentire, with rounded apex and acute base, delicate 19 q q 
texture; the cauline mostly opposite, 1-2 inches long, half & | 
broad, on slender petioles of nearly equal length; the rameal - q 
mostly smaller, inclining to be alternate: glands of the leave — 
few, all marginal, broadly elliptic, light brown: heads rather few) | 
scattered, 9 lines in length, tapering and very acute in bud: scales +t 
of the involucre narrow, 2 of a line in breadth, acuminate, with | 
scarious margins and a single median row of glands: peduncles ati* | 
ing singly: flowers few, about 12, little or not at all exceeding the 4 
Imvolucre: corolla tube very slender, about equalling the achene ® 
_ length; the limb very small, nearly white. —Barranca neat Ow . 
_ dalajara, September, 1889 (n. 2954); also in a similar locality, 
_ October, 1891 (n. 5168). This species is near P. Ervendberg" 
