Dysodia. COMPOSITE. . 397 



3-lobed : heads small : rays broadly cuneate-oblong : style-appendages short and 

 acutish : akeries oblong, densely hispid-ciliate : awns of the pappus 2, much shorter 

 than the corolla, scabrous. Spilanthes Pseudo-Acmella, Hook. & Arn. Bot. Beechey, 

 150. Boltonia Dichetophora, sp., Benth. & Hook. Gen. PL ii. 269. 



Monterey Bay, Lay & Collie. Southern part of the State, Coulter. Receptacle merely convex. 

 Heads 2 lines high. Throat and limb of the disk-corollas longer than the tube. 



4. P. Emoryi, Torr. Sparsely hirsute as well as glandular : leaves round-cordate 

 or fan-shaped in outline, 5 9-cleft and the lobes copiously incised, the upper alter- 

 nate and less lobed : scales of the involucre rather broad : rays short, white, broadly 

 oval : style-appendages oblong and obtuse : akenes narrowly oblong, hispid-ciliate : 

 awn of the pappus only one, very slender, sparsely barbellate above, or in 



Var. nuda, Gray, with no awn. P. nuda, Torr. in Pacif. R. Rep. iv. 100. 



Desert region, along the Rio Colorado on both sides, near Fort Yuma, &c., and on the Gila. 

 Heads rather large for the genus, 3 or 4 lines high : receptacle broad, nearly flat. Rays said in 

 the Botany of the Mexican Boundary, p. 82, to be "plainly yellow" ; but the ticket of Dr. 

 Cooper's specimens from the same district states that they are white. So they are in Palmer's 

 Guadalupe plant. Throat or expanded part of the disk-corolla shorter than the tube. Style- 

 appendages certainly short and obtuse in the original specimens. Yet in one, seemingly of 

 the same species (var. nuda), but with larger rays, collected in 1870 on Carmen Island, Lower 

 California, by Dr. E. Palmer, these appendages are somewhat longer and subulate-acute ! So, 

 also, in specimens recently collected by him on Guadalupe Island. This is evidently a winter- 

 annual ; and so apparently are all the foregoing. 



5. P. leptoglossa, Gray. Cinereous-puberulent : leaves (of branches) small 

 and alternate, ovate and somewhat cordate, slender-petioled, coarsely or doubly 

 toothed : scales of the involucre narrow : rays linear, rather long : style-appendages 

 filiform and acute : akenes linear-oblong, hispid-ciliolate : awn of the pappus only 

 one, very slender, barely scabrous. PL FendL 77. 



California, Coulter. Known only from his collection. Heads large for the genus, 5 lines long ; 

 receptacle merely convex. Rays 4 to 6 lines long : disk-corollas with slender tube and a remark- 

 ably long and narrow cylindrical throat. 



P. PARRYI, P. AGLOSSA, and P. COROXOPIFOLIA, Gray, the latter with distinctly white rays, 

 belong to a region further eastward. 



85. DYSODIA, Cav. 



Head many-flowered, with few or numerous pistillate rays or sometimes none ; all 

 the flowers fertile. Involucre cylindraceous or campanulate, of rather rigid equal 

 scales in a single series, often united below, commonly subtended by a row of bracts. 

 Receptacle rlattish, naked, often alveolate, fimbrillate, or hirsute. Rays entire or 

 2 - 3-toothed at the apex : disk-corollas narrow, 5-toothed. Style-branches of the 

 perfect flowers slender and tipped with a subulate or nearly filiform hispid append- 

 age. Akenes linear or linear-cuneate, 4 5-angled or many-nerved. Pappus single, 

 of 10 (or rarely more) firm chaffy scales which are deeply dissected into many rigid 

 scabrous bristles, about equalling the corolla. Herbs (all Mexican and N. Ameri- 

 can) ; with strong and mostly disagreeable scent (whence the generic name), opposite 

 or alternate leaves, and peduncled heads of yellow, orange, or reddish flowers : scat- 

 tered oil-glands rather conspicuous in the foliage and involucre. 



D. CHRYSANTHEMOIDES, Lagasca, common along the waters of the Mississippi and thence to 

 Mexico, may approach California by way of Arizona. 



D. SPECIOSA, Gray, a striking and apparently shrubby species, with rounded ternate leaflets 

 and large heads, was discovered at Cape San Lucas in Lower California, far beyond our limits. 

 The following have been found in the State. 



1. D. porophylloides, Gray. Loosely much branched, about 2 feet high, 

 glabrous : branches slender and rigid, striate, terminated by middle-sized heads : 



