30 CONTRIBUTIONS TO WESTERN BoTANyY No. 17 
ing under sycamore and alders on moist flats near the creek in Ramsey 
Canon, Huachuca Mts., Ariz., Apr. 6, 1930. 
Chenopodium capillare N. Sp. A slender annual hardly a foot high, 
dichotomously branched from the base into a rounded mass about as wide 
igh, glaucous-green throughout and smooth except for dense scurf 
that of Teloxys or Chenopodium botrys. The whole of the upper half is a 
mass of dichotomous pyramidal infllorescence, with the flowers about sessile 
in the forks and one to few there, and with the terminal one on a long and 
capillary (pseudo) pedicel 1 cm. long or Jess. Stamens apparently 1-2 and 
barely exserted. Flowers about 1 mm. wide and depressed-lenticular, with 
5 oblong-ovate sepals very scurfy, which are spreading at maturity, or at 
least open somewhat. Seed single, lenticular, much flattened an i 
half its length, barely an inch long. Leaves many. Growing in sand along 
with Abronia Crux-Maltae, etc. Carson Sink near Wadsworth, July 7, 1930. 
Mentzelia acerosa N. Sp. Caespitose perennial from a thick and 
fleshy and erect root. Stems slender, much branched from the base, white- 
barked and bary densely white-pubescent, and stems closeset and tangled, 
very leafy throughout and with short internodes, particularly above, and 
becoming fascicled, and with the few flowers sessile among the leaves at the 
ends. Leaves 1-3 inches long, pinnately cleft to the base into 3-5 divisions 
which are subulate-acuminate into a sharp spine and very pubescent with 
very short and stiff and warty hairs spreading at right angles, with revolute 
margins and raised midrib, leaves sessile and thick. Flowers yellow, about 
1 cm. long, with the 5 lanceolate petals sharply acute and hairy on the out- 
side, and surpassed by the many stamens which have capillary filaments and 
oval anthers. Calyx lobes subulate and as long as the petals. Fruit ovate, 
about 5 mm. long, rough-hairy; seeds smooth, oblong, hardly 1 mm. long, 
apparently 3-angled and winged on the angles. Plants growing on bare clay 
hills near Bruneau, Idaho, June 23, 1930 
hairy with very long and slender setae 3-4 mm. long. Corolla barely sur- 
passing the calyx lobes, a dirty-white, with the lobes rotately spreading and 
round. Filaments coiled and not so exserted, but much longer than the 
corolla which is about 6 mm. long. Calyx lobes very narrowly linear and 
