ROBINSON AND GREENMAN. — GENUS ZINNIA. 17 



covered on dry liiUs of the coast at the same point by W. G. Wright., 

 January, 1889, no. 1201 (distributed as Z. rnaritima ?) ; also by F. H. 

 Lamb on dry rocky cliffs at same place, 26 December, 1891, no. 325 

 (distributed as Z. inaritima). In the presence of good material of all 

 three species we cannot doubt the complete distinctness of tliis species 

 from the preceding and from the following. 



§ 3. Herbs with ovate or elliptic-oblong leaves : head' strongly 

 bicolorous ; disk dark purple-brown, nearly black ; rays oblong, bright 

 yellow. 



9. Z. rnaritima, HBK. Prostrate, much branched from the base : 

 stems spreading: leaves elliptic or elliptic-oblong, obtuse at the apex, 

 rather abruptly contracted to short but distinct pubescent petioles : heads 

 8 to 10 lines in diameter (incl. rays), terminal, mostly borne on long 

 naked peduncles : chaff narrowed above although obtusish at the 

 dark-colored point ; achenes of the disk-flowers strongly callous- 

 margined : rays oblong, golden yellow ; ray-acheues ^\ to 2 lines long. 

 — Nov. Gen. & Spec. iv. 25 1 , not Gray, I.e. — Acapulco, Humboldt Sf 

 Bo upland ; rediscovered at the same point by Palmer, February, 1895, 

 uo. 523. From its peduncled heads, oblong rays, callous-margined 

 achenes, etc., we cannot doubt that Dr. Palmer's plant represents 

 the real Z. rnaritima which came from the same locality so long ago. 

 Yet Palmer's plant has leaves considerably larger than those described 

 by Kunth. 



10. Z. Palmeri, Gray. Erect branched annual, a foot or so in 

 height : leaves ovate, or lanceolate from an ovate cordate or subcordate 

 closely sessile base, acute or acuminate at the apex. — Proc. Am. 

 Acad. xxii. 423. — Jalisco, at Tequila, Palmer, no. 386, Pringle, no. 

 4557 ; also at Manzanillo, Palmer, no. 893, and Colima, Palmer, no. 

 893 a. 



§ 4. Erect perennials with spreading branches and narrow linear or 

 oblong leaves: rays oblong, 4 to 12 lines in length, deep orange- 

 colored as well as the disk-flowers. 



11. Z. linearis, Benth. Much branched, 8 inches to a foot or 

 two in height: heads many and very showy, of intense orange color 

 (persisting evt-u in old dried specimens): leaves linear or nearly so. — 

 PI. Hartw. 17. — Aguas Calientes, Hartweg, no. 117; San Luis 

 Potosi, near Morales, Schaffner, no. 210, and in same state by Parry 

 ^ Palmer, no. 441 ; Jalisco, on the Rio Blanco, Palmer, no. 54, and 

 on hills near Guadalajara, Pringle, no. 1778. 



VOL. xxxiJ. — 2 



