386 DESCRIPTIONS OF NEW SPECIES 



with dark purple anthers and stigmas. Allied, though remotely, to Blepha- 

 ripappus, which ought to be referred to the Madie^. — (Named from its mi- 

 nute, feathery pappus.) 



Ptilonella scabra. Blepharipappus scaber, Hook. Flor. Bor. Am., Vol. I., 

 p. 316. 



Hab. The prairies of Oregon, east of Walla-Walla. Erect, about a foot high, towards the 

 summit dividing into numerous filiform, virgate branches, somewhat corymbose at their sum- 

 mits. Leaves numerous, minutely scabrous, linear, somewhat obtuse, attenuated below, sessile, 

 from a quarter of an inch to an inch long, scarcely half a line wide. Stem smooth and shining. 

 Involucrum and upper leaves glandular and viscid. Sepals oblong-lanceolate, a little hirsute. 

 Rays two or three, white, widely dilated, about as long as the involucrum, with filiform, smooth 

 stigmas. Discal florets about eight, also white; anthers and stigmas blackish purple. Infertile 

 achenium nearly smooth, empty and barren, with a coarser pappus of about twelve filiform fim- 

 briate scales. Radial florets sheathed by the sepals to their summits. 



Obs. As this plant is wholly at variance with the published generic and specific character of 

 Blepharipappus glandulosus, I have presumed to separate it as a genus. 



Division III. — Madie^. (Decand.) 



MADIA. (Molini.) 

 Madia sativa. 



Hab. In the plains of Oregon towards the sea, particularly on Wappatoo Island, at the outlet of 

 the Wahlamet. 



Madia * capitata; very hairy and viscid ; leaves linear, amplexicaule ; flow- 

 ers mostly in terminal clusters. 



Hab. With the above, and in the Rocky Mountains, of which, except the inflorescence, it ap- 

 pears little more than a variety. Achenium black, smooth, granulated, rather flat, and som.ewhat 

 four-sided. Rays trifid, rather conspicuous. 



MADARIA. (Decand.) 



Madaria *racemosa; stem simple, erect; flowers axillary, racemose, on ex- 

 serted pedicels; leaves narrow-linear, sessile, hirsute, radical serrulate; above, 

 with the involucrum, pilose and glandular. . 



Hab. Plains of the Wahlamet, near the falls. Nearly allied, apparently, to M. corymbosa, but 

 the flowers are not in a corymb, though sometimes fastigiale. Rays about fifteen, yellow, often 

 with a dark brown spot at the base of each, deeply trifid, twice as long as the disk. Sepals 



