ROBINSON AND GREENMAN. — MEXICAN PLANTS. 387 
CrusEA coronaTA. Low: stem purple with spreading branches, 
nearly or quite smooth: leaves linear, smooth, acute, 5-10 lines long, 
1 line wide; margins revolute ; stipular sheaths very short, bearing on 
each side 3—4 often ciliated bristle-formed teeth : flowers sessile, axillary 
and terminal, single or less frequently in pairs subtended by two bracts 
with their bristle-toothed stipular sheath: calyx segments linear, acute, 
2-2} lines long: corolla very small, only 3 line long, 4-toothed at the 
summit: stamens included, inserted near the base of the corolla tube; 
filaments slender: stigma 2-cleft; divisions of the fruit short, columnar, 
minutely hispid, slightly enlarged at the summit and crowned with 
a row of spreading bristles. — Collected on dry, rocky soil, Tequila, 
3 October, 1893 (no. 5424). This species bears a habital resem- 
blance to C. subulata, Hook. & Arn., but is well characterized by its 
crowned fruit. 
GyMNOLOMIA PATENS, Gray, var. ABBREVIATA. Stem 3-5 feet 
high : petioles much shorter than in the type, about 2 lines in length: 
heads rather closely grouped at the ends of the branches. — Collected 
in ravines near Tequila, Jalisco, 21 September, 1893 (no. 4595). 
GymnoLomia rupis, Gray, var. mtvor. Leaves elliptic, smaller 
than in the type, 2 inches long, 3 inch broad, reflexed: heads also 
smaller, but 8 lines broad.— Collected on rocky hills near Tequila, 
Jalisco, 7 October, 1893 (no. 4584). j 
ViguierA PrinGLet. Shrubby, 5-10 feet high, scabrous : leaves 
all but the uppermost opposite. elliptic or ovate, of firm texture, entire 
or somewhat denticulate upon the strongly revolute margins, 3-nerved 
and prominently reticulated beneath, 2} inches long, 12-14 ines 
broad, green and very rough upon both surfaces, sessile or subsessile, 
obtuse and mucronate or acutish at the apex, obtuse at the base, 
translucent-punctate: heads exclusive of the rays about 8 limes 
in diameter, corymbose ; pedicels becoming an inch long in fruit: 
involucral scales imbricated in about 5 series, linear-oblong, acute 
Mr. Pringle on hills near Zapotlan, 12 May, 1893 (no. 4365). 
Flowering specimens of the same plant, collected by Dr. 
Palmer, at Tepic, 5 January to 6 February, 1892 (no. 1979), ve , 
been very kindly sent to us by Dr. J. N. Rose of the Department ‘ 
Agriculture. a 
