268 ; BOTANICAL GAZETTE [APRIL 
rather numerous: pappus slightly dingy, equaling the slender 
corollas: akenes linear, pale, sparsely and minutely soft pubes- 
cent. 
This tall handsome species differs from the species known to the writer 
in its early development. It comes into blossom in April, whereas most of 
the species are autumnal or at least of late summer. But apart from that its 
morphological characters readily distinguish it. 
Collected by Mr. Leslie N. poriding, Big Bend, Virgin River, Arizona, 
May I0, Ig02, no. 757. 
’ Machaeranthera coronopifolia, n. n.—Dieteria coronopifolia Nutt. 
Trans. Am. Phil. Soc. 7:300. Annual, or probably often biennial, 
divaricate-branched from the base upward (rarely two or more 
stems from the base), 1-24" high, green but puberulent and 
minutely glandular: leaves from moderately to very deeply 
pinnatifid, oblanceolate in outline, from 1—4°™ long; the seg- 
ments very variable, from linear to oblong or merely with broad 
teeth upon the margins of the blade, setulose-mucronate: heads 
large: the involucre in about 5 series, the slender green reflexed 
portion of the bract about as long as the scarious imbricated 
base: rays often nearly 2™ long, bluish- -purple: akenes sparingly 
appressed pubescent. 
This is in part the Aster tanacetifolius of Gray, Syn, Fl. 206; not Machae- 
ranthera tanacetifolia Nees, nor the 4. tanacetifolia of Greene in Pitt. 3:59. 
This northern species may at once be distinguished from that southern 
and earlier named one by its greener aspect, lower stouter and more spread- 
ing habit, simply ose leaves, broader and more numerous involucral bracts, 
and by th ssed pubescence of the akenes. Of oe southern species 
I have seen Baty a “few plants, but Wooton’s no. 22, a, N. M., seems to 
be quite typical. The northern species is frequently aie in Wyoming, 
northern Colorado, and western Nebraska. 
My numbers are 443, Platte River, July 13, 1894; 2581, Chug Creek, 
August 1, 1896; and 8205, Colorado-Wyoming line, August 28, 1900. 
- Aster meritus, n. sp.—Stems one to several from each of the 
many crowns of the woody roots and rootstocks that make up 
the dense perennial base, the tufted stems suberect or more 
usually widely spreading and forming a mat 5-10 across, 
2-4°™ long, green but under a lens sparsely pubescent, simple or 
branched, leafy throughout: leaves oblong or sometimes elliptic, 
3-7" long, subacute, entire or obscurely crenulate-serrate, glab- 
