650 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2. Kuhnia chlorolepis Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 177. 1913. 
Typz LocaLity: Mangas Springs, New Mexico. Type collected by Metcalfe 
(no. 104). 
RanGE: Southwestern New Mexico and adjacent Arizona and Mexico. 
New Mexico: Mangas Springs; Cliff; Alamo Viejo. Open hillsides. 
10. COLEOSANTHUS Cass. 
Large herbs or low shrubs with opposite or alternate leaves and variously arranged 
discoid heads of white or greenish flowers; bracts thin, striate, regularly imbricated, 
the outer shorter; receptacle naked; pappus a single series of capillary barbellate 
bristles. 
KEY TO THE SPECIES, 
Heads 25 to 50-flowered; plants herbaceous to the base. 
Peduncles densely glandular-viscid; heads rather small.... 1. C. modestus. 
Peduncles not viscid; heads large. 
Peduncles mostly shorter than the few congested 
heads. 2.2.0... eee eee eee eee eee eee eee e eens 2. C, 
Peduncles equaling or exceeding the numerous heads. 
Outer bracts merely acute, the inner obtuse; leaves 
acute, subcordate................2......-... 38. C. ambigens. 
Outer bracts long-acuminate, the inner acute; 
leaves various. 
Heads few, on slender erect branches; leaves 
attenuate, truncate or cuneate at the 
DS 4, C0. 
Heads numerous, on stout spreading branches; 
leaves merely acute, subcordate........ 
Heads 9 to 25-flowered; plants mostly woody at the base or 
nearly throughout. 
Leaves sessile, or the lower short-petiolate. 
Leaves alternate, merely scaberulous or glabrous. 
Leaves serrate; heads axillary.............-------- 6. C. brachyphyllus. 
Leaves entire; heads in terminal corymbs. ....... 7. C. linifolius. 
Leaves opposite, abundantly pubescent. 
Stems hirsute; leaves crenate.........---...----- 8. C. betonicaefolius. 
Stems canescent or puberulent; leaves not crenate. 
Leaves narrowly oblong or linear; heads long- 
pedunculate. #..............-.-------.-. 9. C. venosus. 
Leaves lanceolate; heads on very short stout 
peduncles .............--20--22---2---- 10. C. wootoni, 
Leaves all.conspicuously petiolate. 
Bracts and peduncles glandular-viscid. 
Tips of bracts spreading; heads terminating slender 
branches covered with reduced bractlike 
leaves....-..-----2----0-2 2-022 11. C. seaber. 
Tips of bracts appressed; heads on short naked pe- 
duncles. 
Heads nearly sessile; leaves very small, 
laciniate-toothed. 
Leaves coriaceous, very viscid; heads 15 
to 18-flowered.........22.....22.-- 13. C. baecharideus. 
Leaves thin, scabrous; heads 9 to 12- 
flowered...........-...........-.-.12.. C. laciniatus. 
~ 
umbellatus. 
~ 
grandiflorus. 
~ 
C. 
petiolaris. 
qa 
