374 DESCRIPTIONS OF NEW SPECIES 



t Shruhby species, with alternate leaves. 

 Bahia confertiflora; (Decand.) 



Hab. St. Barbara, Upper California. A low, branching shrub, about a foot high, with the stem, 

 involucrum, and leaves beneath whitely tomentose. Leaves somewhat ternately pinnatifid, am- 

 plexicaule at base, about one to one and a half inches long, the segments about aline wide. Flow- 

 ers at length loosely pedicellate, at first, when in flower, in sessile clusters. Primary leaves some-, 

 times simply trifid, divisions usually about two long lateral ones, with the terminal ones short. 

 Flowering in April. 



Bahia ^trijida; leaves small, cuneate, amplexicaule, trifid at the summit; 

 corymb contracted, many-flowered ; pappus eight-leaved, alternately narrower 

 and longer; stem and under side of the leaves whitely tomentose. 



Hab, With the preceding, which it nearly resembles, but the leaves are smaller and rather 

 crowded. Kays and sepals five to seven ; stem densely, and, at the summit, often arachnoidly to- 

 mentose. 



Bahia stcechadifolia; (Decand.) Obs. Radical leaves sparingly pinnatifid, 

 upper leaves linear, entire, obtuse. 



Hab. With the preceding. A very low shrub, leaves linear, crowded below, two inches long, 

 about a line wide, whitely tomentose beneath; corymb contracted. Perfect flower not seen. Pap-- 

 pus eight-leaved, the four at the angles of the fruit narrower and longer. Receptacle deeply 

 alveolate. 



Bahia artemisicBfolia; (Less.) 



Hab. St. Francisco, Upper California. 



'HYMENOPAPPUS. (L'Heritier.) 

 Hymenopappus tenuifolius. 



Hab. Plains of Red River and Missouri. 



Hymenopappus filifolius. 



Hab. Plains of the Oregon. In my specimens the pappus is rather conspicuous. 



Hymenopappus Gluteus; canescently tomentose; stem slender and dwarf;, 

 leaves bipinnatifid, ultimate segments or lobes very short, linear, obtuse; se- 

 pals rounded, about twelve; florets yellow ; panicle few-flowered, subcorymbose; 

 pedicels moderate; achenium densely lanuginous; pappus short. 



Hab. Rocky Mountains, towards the Colorado of the West, particularly on Ham's Fork. Usu-. 

 ally less than a foot high. Leaves short, with crowded segments, resembling Milfoil ; for the most 

 part whitely tomentose, sometimes nearly green. Root-stock thick, almost woody, very woolly 

 between the leaves. Stem about a span, slender, three to five-flowered, somewhat dichotomal;, 

 capituli fastigiate, florets yellow, the border narrower and less deeply cleft than usual. Stigmas, 



