* 
BLAKE.— ENCELIA AND RELATED GENERA. 367 
= = More herbaceous; leaves larger, generally canescent or white-tomentose; 
involucral scales generally tomentose or canescent-pubescent. 
x Leaves green; scales mostly ciliate. 
7. E.°wauirronia Cav. Suffrutescent, branched, apparently 
diffuse, the stems, young branches, and in a less degree the peduncles 
canescent with fine incurved hairs; leaves ovate, acute or obtusish, 
cuneate or nearly truncate at base, entire or slightly repand-toothed, 
somewhat pubescent with incurved hairs but not canescent, 2.5-3.5 
cm. long, 1.2-2 em. wide, on petioles a centimeter long; peduncles 
axillary and terminal, simple or 2-3-branched, monocephalous, 
nearly naked; heads 8 mm. high, 1.2—1.4 em. wide excluding rays; 
involucre 5-6 mm. high, the scales somewhat unequal, 2-3-seriate, 
linear-lanceolate, glandular-ciliate; rays 10-12, broadly oval, barely 
3-lobed, pubescent on tube and back; disk-corollas 4.5 mm. long, with 
short tube, glabrous; pales 7.5 mm. long, glandular-pubescent on 
back; immature achene 3.6 mm. long, villous on margin, otherwise 
nearly glabrous. 
Encelia halimifolia Cav. Icon. iii. 6. t. 210 (“1794” = 1795). 
Pallasia grandiflora Willd. Sp. Pl. iii. 2261 (1804). 
Specimens examined: Sonora: Yaqui River, 1869, Palmer 12 
F GN). There is also a sheet in Gray Herb. (ex herb. Klatt) labeled 
“Ex horto Scholae centralis Monspeliensis. Mexico? Peruvia!” 
but the specimen is doubtless from Mexico. 
' & & Leaves canescent or tomentose, or involucre densely pubescent. 
© Leaves green; apogee usually densely and softly tomentose; plants of 
ornia and Lower California 
8. E. cattrornica Nutt. Much branched, somewhat spreading 
from a frutescent base, 6-10 dm. high, or on San Clemente Island 
becoming 3-3.6 m. high, 2.5-10 cm. in diameter; stem and peduncles 
canescent with fine incurved-spreading rather soft hairs; leaves from 
lanceolate to ovate, acute, cuneate or rarely slightly rounded at base, 
entire or somewhat repand-dentate, appressed-pubescent with soft 
hairs but distinctly green, 3-6 cm. long, 1-3 em. wide, on petioles 
0.5-3 em. long; peduncles long, terminal and axillary toward ends of 
branches, nearly naked; disk 1.5-2.5 em. in diameter; involucre 
1-1.3 em. high, the scales 2-3-seriate, lanceolate, densely tomentose; 
rays oblong, 14-20, pubescent on tube and exterior, 1.5-3 cm. long; 
disk-corollas 5 mm. long, glabrous or the teeth pubescent; pales 7.5- 
10 mm. long, glandular-puberulent above; achenes 5.5-6 mm. long, 
villous on margin and pubescent down the middle of each side, awnless. 
