CONTRIBUTIONS TO WESTERN BOTANY 83 
clined to be woody below, with several simple stems fromthe root. 
Leaves rosulate below, linear-oblanceolate, gash-toothed, floccose- 
hyaline. Styles black or dark red. Pappus plumose to base, 
not chaffy below. Akenes linear, truncate, smooth. Styles linear 
and quite broad and yellow. 
‘Lithonia tubeformis Cass. No. 27705, La Barranca Guadala- 
jara, Nov. 23 1930. Plants annual and with the habit of Helian- 
thus annuus and possessing the cultivated fields in the same way, 
4-6 ft. high, racemosely branched and ending in single, large and 
long-peduncled heads. Leaves ovate to triangular-ovate, acumi- 
hate, coarse, 3-nerved, on stout petioles about 1 em. long, some- 
what margined, Leaves crenulate, ashy with short white hairs 
from a pustulate base, darker above, with the young parts silvery- 
silky with fine white hairs 5 mm. long. Heads 1-1.5 mm. wide, 
and wider than high with convex receptacle. Proper bracts ina 
single series, or with an intermediate series of narrower ones 
within which are not acerose asare the disk ones, all bracts strong- 
ly many-ribbed, oblong, 1 em. long, acutish, appressed except at 
very tips, ashy-hairy as are the leaves, but pubescence lunger. 
Chaff on receptacle linear, convex, nearly smooth, acuminate into 
# very stout and spinose beak 2 mm. longer than the flowers. 
Rays 1-2 inches long, light-yellow, about 1 cm, wide, veined, from 
ubortive, flat, and slightly winged ovaries, and without pappus, 
and smooth except for some cobwebby hairs. Disk akenes black, 
smooth, angled truncate, linear, about as long as corollas, crowned 
by a row of minute and lacerate scales, and often with 4 awns from 
winged bases, but very deciduous. 
Bidens pedata Brandg. No. 27779. Qn trail down the Laguna 
on cliffs. Sept. 241930. A tufted and erect shrub 2 ft. ‘ high, 
with innumerable filiform, dissected and smooth leaves 2-3 inches 
long. Stems produced into long and peduncle-like and simple 
floral peduncles about a foot long, ending in 1-2 rudimentary 
leaves and a few cymosely arranged heads on filiform pedicels 1-2 
inches long Heads inch wide, with few short orange rays. 
Akenes with 2 coarsely and retrorsely barbed awns and no. crown. 
ot at all fleshy. It-belongs.in the Seemani group. 
