124 



FIELD COLUMBIAN MUSEUM BOTANY, VOL. III. 



SALMEA DC. Cat. Hort. Monsp., 140. 



Heads homogamous, discoid; flowers perfect, fertile, tubular. 

 Involucre short campanulate of subherbaceous bracts, imbricated in 

 few series, outer shorter. Receptacle convex, conic or elongated, 

 chaffy; scales complicate, enfolding the achenes and falling with them. 

 Achene laterally compressed ; pappus of 2 unequal awns, continuous 

 with the margins of the achene. Erect or reclining shrubs with small 

 corymbose panicled heads. 



Salmea Gaumeri Greenman sp. nov. 



Shrub:* Stems striate, hirsute-pubescent above, the older stems covered 

 with a grayish white bark, and rather numerously dotted with lenticels; 

 leaves opposite, petiolate; petioles I cm. or less in length, hirsute-hispid; the 

 blade oblong-ovate, 5 to 7 cm. long, 3 to 4 cm. broad, subcordate to rounded 

 at the base, obtuse or rounded at the apex, often mucronulate, tuberculate 

 #r hispid on the upper surface, grayish or brownish tomentose beneath, the 

 midrib above subappressed hirsute: inflorescence in a terminal cymose pani- 

 tle: heads sessile or nearly so, small, 7 mm. high, 5 mm. or less in diame- 

 ter, about 15 flowered; involucre 2-3 seriate; 

 scales oblong, obtuse, pubescent; corolla erect; 

 receptacle convex, scales subacute, erose- 

 denticulate at the summit: achenes (none 

 mature in our specimen^), brown, cune- 

 ate, apex obliquely truncate, i x 2.5 mm., 

 glabrotis or nearly so; pappus unequal 1-2.5 

 mm., long, the outer (longer) awn bearing 

 a wing narrowly continuous on the achene. 



Collected by G. F. Gaumer, M.D., 

 in forests 8 miles south of Izamal, Yucatan, 

 October, 1895, No. 977. Type specimens 

 in field Columbian Museum, Chicago, 

 III., and in the Gray Herbarium, Cam- 

 bridge. 



This species with Salmea curviflora R. 



Br. and its well-marked variety S. curviflara R. Br. var. glabrata 

 {Otopappus curviflorus Hemsl., var. glabratus Coulter Bot. Gaz. 2O:jo) 

 constitute a well-defined section of the. genus Salmea. from S. curviflora 

 however, the present proposed species may be distinguished by the leaves being 

 #vate-oblong, instead of ovate-acuminate, and by the shorter, blunter, and 

 more pubescent involucral scales. 



Hab. "Shrub, 20 feet high, not common, in forest 8 miles south 

 of Izamal, October; flowers white, very aromatic," Gaumer 5777 (type). 



ENCELIA Adans, Fam., 2:128. 



Heads heterogamous, radiate, ray flowers neutral, ligulate; disk 

 flowers perfect, fertile, tubular (or rays sometimes wanting). Invo- 

 lucre hemispheric or wide campanulate of herbaceous bracts, imbri- 



*Dr. Greenman's original description and notes are given in italics, additional description and 

 notes in body type. 



