430 PROCEEDINGS OF THE AMERICAN ACADEMY 



areolae densely tomentose, finally glabrate ; spines 8 to 12 (usually 

 10), very stout, straight, ash-colored tipped with black, the marginal 

 spreading or reflexed (6 lines long or less), the central one and some- 

 times the two uppermost larger (^ to 1^ inches long) and erect or 

 ascending, compressed or angular : fruit dry, globose (2^ or 3 inches 

 in diameter), closely covered with pulvinate densely hairy areolae, 

 which are for the most part beset with stiff setaceous unequal yellowish 

 spines (the longest 9 to 12 lines long) : seeds large (2 lines long), black 

 and shining ; embryo hamate. — Growing 20 to 30 feet high and 2 

 feet in circumference, on stony mountain-sides at Hacienda San Mi- 

 guel (AA) ; called " Cordon," or " Hecho," by the Indians, who grind 

 the seed to mix with their meal, and use the bristly covering of the 

 fruit as a hair-brush. The species was first made known to Dr. Engel- 

 mann by a specimen of these brushes which was obtained by Dr. Palmer 

 in 1869 from the Papago Indians at Hermosillo in Sonora. Dr. Engel- 

 mann's notes upon his material have been found among his papers. 

 From these it appears that the remains of the tube of the flower showed 

 very numerous loosely imbricated linear-lanceolate sepals, 6 to 9 lines 

 long, woolly in the axils. Palmer's present specimens, scanty, but sup- 

 plemented by a photograph and by notes, are sufiicient to furnish most 

 of the needed characters and to confirm the distinctness of the species. 

 The flowers remain unknown. C. macrogonus, Salm-Dyck, of un- 

 known origin, has been in cultivation since before 1850. Plants so 

 named in hort. Cambridge, now about three feet high, resemble the 

 present species, and it is possible that the two species may finally pi'ove 

 to be the same. 



Eryngium Wrightii, Gray. — Norogachi (390). 



Eryngium discolor, Watson. — Same locality (397). 



Arracacia edulis. Rather stout, glabrous, branching, a foot 

 high or more : leaves pinnate, the upper sessile upon a dilated base ; 

 leaflets lanceolate, more or less deeply pinnatifid or pinnately parted : 

 umbels without involucre, 10-15-rayed, the fertile rays (about 5) be- 

 coming an inch long or more ; involucels large, of several pinnatifid 

 bracts : flowers yellow : fruit compressed-ovate, with thick corky ribs 

 and broad vittae filling the intervals, 3 lines long ; seed involute-terete. 

 — Same locality (HH) ; much used by the Indians for greens. 



Daucus montanus, Willd. — Yerba Buena (308). 



Garrta ovata, Benth. A shrub, 8 to 12 feet high, with blue- 

 black berries. — Cumbre (319). 



