180 PROCEEDINGS OF THE AMERICAN ACADEMY 
cies stands near P. rigida, Gray, but differs from it in its more — 
numerously flowered heads, in the character of the inyolucre, and — 
somewhat in the shape of the leaves. The heads, however, are not 
so large as in P. formosa, Gray, and P. turbinata, Llav. & Lex, 
nor do the involucral bracts extend down upon the peduncles as iD : 
these species. : 
ANDROSACE (?) CINERASCENS. A spreading perennial of grayish . 
green color, 6-10 inches in height, a little woody at the base: stems : 
ascending, several times branched, very leafy: leaves narrowly 
linear, acute, sessile, perhaps slightly fleshy, 1-1} inches-long, }-2 — 
of a line broad: peduncles slender, smooth, 3-4 inches long, beat 
ing 4-8 corymbosely grouped flowers; pedicels ebracteolate, fil 
form, 6-8 lines long: the short calyx tube hemispherical; segments 
lanceolate, acuminate. corolla small, salver-shaped, 2 lines long; : 
white or nearly so; capsule enclosed by the persistent calyx, dehis 
cent by 5 valves: placenta spherical, raised on a very short stipe? 
seeds numerous, minute. — Alkaline plains, Hacienda de Ango® 
tura, San Luis Potosi, July, 1891 (n. 3765). This plant, which 
is very different in habit and inflorescence from any Androsae?- 
which I know, appears nevertheless to agree with that genus in all 
essential characters of flowers and fruit. The genus as descri © : 
- by Bentham and Hooker is rather widely drawn. The species just 
characterized agrees more nearly with § Aretia than with Euandre 2 
sace, but differs from both in its inflorescence. a 
Dicryanruus tuBerosus. Root thickish, enlarged and fusifor™ Be 
toward the end, resembling a small tuber: stem short, somewhat . 
woody, erect or procumbent, bearing near its summit several ty 
simple spreading hirsute branches: leaves ovate, acuminate, entity | 
deeply cordate, with a narrow but rounded sinus, pubescent on hott 
surfaces and ciliate, 1-14 inches long, on hirsute petioles 4-7 ee 
in length: flowers occasionally solitary, usually 2-4 together, will @ 
or without a short common peduncle; pedicels 2-4 lines long: C4" : 
divided nearly to the base into lanceolate acuminate hirsute “e 
ments, 3-4} lines in length: corolla campanulate, 4-6 lines deep* 
tube marked with narrow purple stripes; limb of spreading Mas 
vangular segments of dark color, and but 2-3 lines in length: fol 
cle narrowly lanceolate in outline, about 2 inches long, tapering © 
a bluntish apex, armed with short, firm spines, and appearing heal 
from numerous minute longitudinal folds of its outer integument. — 
Slopes of barranca near Guadalajara, September, 1890 (n. 3568 : 
First collected by Dr. Edward Palmer near the same locality, July 
oat 
ce 
