654 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
KEY TO THE SPECIES. 
Heads discoid. 
Leaves merely dentate.........-..------- +222 222-222 eee eee 1. G. aphanactis. 
Leaves laciniately toothed, the lower ones pinnatifid with 
dentate segments.........--..---- cece eee eee eee eee 2. G. pinnatifida, 
Heads radiate. 
Peduncles pubescent...-------.-.-..-...-...--------------. 3. G, scabra, 
Peduncles glabrous. 
Pappus awns conspicuously barbellate................-. 4, G@. subalpina. 
Pappus awns smooth except under a compound micro- 
scope. 
Tips of the outer bracts spreading, none reflexed, 
Disk about 20 mm. broad; cauline leaves ovate 
to obovate.............-+-- - 5. G. arizonica, 
Disk 12 mm. broad or less; cauline leaves ob- 
lanceolate. 
Leaves conspicuously —spinulose-toothed; 
bracts scarcely at all viscid. ........- 6. G, setulifera, 
Leaves not spinulose-toothed; bracts strongly 
viscid... 2.2... 2222.2 7. G. decumbens. 
Tips of the outer bracts squarrose, those of the outer- 
most strongly reflexed. 
Cauline leaves ovate or oblong, broadest at the 
base; tips of the bracts subulate. 
Leaves bluish green, spinulose-dentate; heads 
very broad and flat, the bracts broad, 
with flattened tips..........-2.222... 8. G. texana. 
Leaves yellowish green, merely dentate; 
heads hemispheric, the bracts narrow, 
with terete tips.....-...-.-.. ceeeeee 9. G. squarrosa, 
Cauline leaves narrowly oblong or oblanceolate, 
not broadest at the base; tips of the bracts 
flat, never subulate. 
Leaves coarsely and irregularly incised- 
toothed; heads densely viscid, 15 mm. 
wide or smaller........... .-10. G. subincisa. 
Leaves evenly and finely serrate; heads v vari- 
ous. 
Bracts abundantly viscid, the tips nar- 
row and thick, strongly reflexed.11. G. serrulata, 
Bracts scarcely at all viscid, the tips 
broad and flat, slightly reflexed..12. G. neomexicana. 
1. Grindelia aphanactis Rydb. Bull. Torrey Club 31: 647. 1904. 
Tyre LocaLity: Durango, Colorado, 
RanGE: Southern Colorado to Arizona and New Mexico. 
New Mexico: Farmington; Dulce; Santa Fe; Glorieta; Ramah; Watrous; Pajarito 
Park; Gallinas Planting Station; Raton Mountains; Gallup; Belen; Socorro; Laguna; 
Albuquerque; Mesilla Valley; Organ Mountains; White Oaks; Roswell; Lake Valley. 
Plains and low hills, in the Lower and Upper Sonoran zones. 
2. Grindelia pinnatifida Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 178. 1913. 
TypEe LOcALITy: Open slopes about Chama, New Mexico. Type collected by 
Standley (no. 6606). 
RanGE: Vicinity of the type locality, in the Upper Sonoran and Transition zones, 
