ROBINSON AND GREENMAN. — GENUS ZINNIA. 15 



2. Z. pumila, Gray. Very similar to the preceding : leaves linear, 

 flat, mostly less than half inch long, prominently 1-uerved. — PI. Feudl. 

 81, PI. Wright, i. 105, & ii. 86. — Hills, W. Texas, Wright, nos. 323, 

 1215, to Arizona, Camp Grant, Palmer, no. 122, near Tucson, Greene, 

 no. 1106, Camp Lowell, Pringle, Lemmon, nos. 91, 92, near Sta. Cata- 

 Hna, Lemmon, no. 3033, Lowell Mts., W. F. Parish ; Mexico, on high 

 plains near San Juan de la Vequeria and at '' Castaniola " {^= Cas- 

 tanuela ?), Gregg, no. 279 ; on llanos of Sonora, Schott ; east of Guada- 

 lupe Cailon, E. K. Smith; near Carneros Pass, Coahuila, Pringle, no. 

 2390 (distrib. as Z. acerosa) ; San Luis Potosi, Schaffner, no. 336, and 

 Parry Sf Palmer, nos. 439, 440. The technical distinctions between this 

 and the preceding are unsatisfactory at best, although the specimens are 

 for the most part pretty readily distinguished upon the foliar differences. 



1- 1- Leaves 3-nerved. 



3. Z. juniper if olia. Gray. Leaves somewhat longer than in the 

 related species, the larger ones inch or more in length, usually whitish 

 beneath : rays oblong, mostly 2 or even 3 times as long as broad, of deep 

 orange color. — PI. Wright, i. 105. Diplothrix junijierifolia, DC. Prodr. 

 V. 612. — North Mexico, mountains near .San Juan de Vanegas, Berlan- 

 dier, 1359; without locality, Gregg, no. 68; Santillo, Parry, no. 40, and 

 near same locality, Palmer, no. 576 ; and on limestone hills, Carneros 

 Pass, Pringle, no. 2404. 



4. Z. grandiflora, Nutt. Leaves less than an inch in length : 

 rays pale or sulphur yellow, very broad, suborbicular in outline. — Nutt. 

 in Torr. & Gray, Fl. ii. 298 ; Torr. in Emory, Report Reconn. Calif, t. 4. 

 — Colorado, on bluffs near Pueblo, Greene, to W. Texas, Wright, nos. 

 322, 1213, Pope, Ft. Davis, Girard ; New Mexico, Fendler, no. 400, near 

 Santa Fe, Wislizenus, no. 415 ; Arizona, near Ft. Whipple, Coues Sf 

 Palmer, no. 2821, Ft. Apache, Palmer, no. 583, Mustang Mts., Pringle, 

 Huerfano, Parry, no. 106, Upper Canadian River, Emory; Sonora, 

 Thurher, no. 312, Smith; San Cedro, Lloyd, no. 401. 



* * Ligules almost obsolete, shorter or scarcely longer than the achenes. 



5. Z. anomala, Gray. Scabrous-pubescent: leaves 9 lines to inch 

 in length, line to line and a half in breadth : heads 3 to 5 lines in di- 

 ameter, appearing discoid or with evident but short yellow rays: disk- 

 flowers apparently orange-red ; the limb velvety-margined. — PI. Wright, 

 i. 106. — Prairies of W. Texas, Wright, nos. 325, 1216; near Saltillo, 

 Coahuila, Mexico, Palmer, no. 581. First coll. (ace. to Gray, 1. c.) by 

 Berlandier in Northern Mexico. 



