ROBINSON & GREENMAN: CONTRIB. GRAY HERBARIUM. 91 
cent beneath, the margins revolute : peduncles long, solitary at the 
ends of the branches; bracts of the involucre attenuate. — Gen., 2, 
364; Hemsl., 1. c., 163; Gray, Syn. fl., 1, pt. 2, 269. Heliomeris 
tenui folia, Gray, PI. Fendl., 84; PI. Wright., 1, 107; 2, 87.— 
Southwestern Texas, rocky cliffs of Turkey Creek and beyond the 
Pecos, Wright , no. 329; rocky hills near Eagle Springs, Wright, 
no. 1223, Sutton Hayes , no. 444; at Presidio, Havard , El Paso, 
Gray , Jones, no. 4347; Santa Maria, Nedlley, no. 163; and Che- 
nantes Region, Nealley , no. 576 ; New Mexico in* the Organ Mts., 
Wooton, no. 442; Mexico, Tamaulipas, Berlandier , nos. 814, 2234, 
E. W. Nelson, no. 4507; Saltillo, Gregg , nos. 21, 125; Coahuila, 
Palmer , nos. 620 to 624 (coll, of 1880), Pringle , no. 148; Chihua¬ 
hua, Thurber, no. 834; San Luis Potosi, E. W. Nelson, no. 4532. 
Subg. 2. Eugymnolomia. Corolla-tube in the disk-flowers 
cylindrical or slightly enlarged at the base; leaves (often serrate) 
not lobed ; stems mostly herbaceous. 
* Heads usually numerous, pedunculate, small or more often medium-sized 
(disk 7 to 12 mm. broad excl. of the rays); involucral scales linear, acutisli 
to attenuate : leaves mostly lance-linear to linear, rarely oblong. 
+- Outer involucral bracts herbaceous, attenuate (1.1 to 1.7 cm. long) coarsely 
ciliate on the margin, otherwise nearly or quite glabrous : ligules 5 to 9, 
elliptic, showy : Georgia. 
6. G. porteri, Gray. Tall slender erect corymbosely branched 
annual with lance-linear to linear chiefly alternate leaves coarsely 
ciliate near the base; those of the stem 6 to 12 cm. long: disk nar¬ 
rowly conical; pales striate, entire, pungent. — Proc. Amer. acad., 
12, 59; Syn. fl., 1, pt. 2, 269; Meehan, Native fl., ser. 1, 2, 137, pt. 
35; Chapm., Fl., ed. 3, 251. Rudbeckia? porteri, Gray, PI. Fendl., 
83; Chapm., Fl., ed. 3, 228. — Growing on scanty humus in hollows 
and crevices of granite rock on the summit and slopes of Stone 
Mountain, Georgia, where curiously local, Porter (type, in herb. 
Gray ), Ravenel, Ilendee, Canby , J. D. Smith, Curtiss, no. 1434, 
Small ; fl. August to October. 
-t- -t- Outer involucral bracts (rarely elongated) usually appressed-pubescent 
or even hoary : ligules 10 to 14, linear or oblong : western U. S. and Mexico. 
7. G. multiflora, Benth. and Hook.f. Perennial: stems usually 
several (1.5 to) 9 or 12 dm. high, from a thickish lignescent stock, 
finely striate and covered with a very short-appressed grayish 
pubescence: leaves lanceolate or linear-lanceolate and acutisli to 
lance-oblong or oblong and obtuse, 4 to 7 cm. long, 4 to 20 mm. 
