MISCBI,I<ANBOUS SPECIFIC TYPES — IV. 153 



RuDBECKiA UMBROSA. Stem Stout, striate, glabrous, all 

 upper part of the plant very leafy and the leaves ample as 

 well as extremely thin ; the lowest parted into 3 leaflets with 

 hirsute petiolules, the length and breadth of the leaf as a 

 whole about 10 inches, the terminal leaflet deeply 3-cleft, the 

 laterals entire or bifid, the margins of all coarsely but not 

 deeply serrate-toothed, neither face rough, but both faces 

 thinly and minutely strigulose; upper leaves reduced, variously 

 3-lobed, none undivided ; heads few and short-peduncled : 

 also not large, the disk globose, the rays few and small : 

 pappus of disk-achenes of about 4 nearly distinct teeth. 



Oak Creek, Arizona, 8 Aug., 1909, by A. Pearson. Evi- 

 dently a plant of dense shades ; the leaves so thin and mem- 

 branaceous as to be in strong contrast to those of other allies 

 of R. ladniata. 



Dasystephana oxyloba. Stems tufted and at base de- 

 cumbent, stoutish and rigid, J^ to 1 foot high, the whole 

 plant glabrous to the unaided eye, but appearing faintly puber- 

 ulent under a lens, or else not at all so : basal leaves crowded 

 on the stem and oval, only /4 to ^ inch long and very obtuse, 

 those midway of the stem more remote, oblong-lanceolate, 

 acutish ; from 3 to 6 of the upper axils floriferous, the flowers 

 subsessile, the whole forming a longer or shorter spike : calyx 

 Ji inch long, the tube much shorter than the teeth or seg- 

 ments, these lanceolate or oblong-lanceolate and quite folia- 

 ceous : corolla purple, iH to 1% inches long, never expand- 

 ing, always of a somewhat elliptic outline, the lobes narrow, 

 long, very acute, of twice the length of the intervening folds, 

 these bifid or more than once cleft. 



A handsome closed gentian, sent in from the mountains of 

 northern Arizona, as collected 9 Sept., 1909, by some one 

 employed in the Forest Service near Flagstaff, the special 

 locality " Wet Park" is named, said to have an altitude of 

 7250 feet. 



I<BAFI,BTS, Vol. II, pp. 153-164. 18 November, 1911. 



