Diinodw. COMPOSIT/R. ;-^(j7 



3-l(tl)C(l : licads small : rays broadly cmieatc-ohloiif^ : stylo-appondagcs sliort and 

 a(;iitisli : akoiies c)l)long, densdy hispid-ciliatc : awns of tlu! pappus 2, niucli shortor 

 than the corolla, S(-al)rous. — ,Spilanthes Pseiuh-Acmella, Hook. ^ Arn. 13ot. lieechey, 

 150. Bnltonia § Dichetophora, sp., Bcnth. Sc Hook. Gen. PI. ii. 2G9. 



Monterey Iky, L'ly k Collie. Routlicni part of tlie Stntc, CouUcr. Receptacle merely convex. 

 Heads 2 lines higli. Throat iiml linili of the disk-eorollas lonp;cr than tlie tulxj. 



4. P. Emoryi, Torr. Sparsely hirsute as well as gland\dar : leaves round-cordate 

 or fan-shnped in ouMine, H-O-eleft and the lolies copiously incised, the upper alter- 

 nate and less lolxnl : scales of the involucre rather broad : rays short, wdiitc, broadly 

 oval : style-ai)pendages oblong and obtuse : akenes narrtnvly oblong, hispid-ciliatc : 

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



Var. nuda, Gray, with no awn. — P. nuda, Torr. in Pacif. It. Pep. iv. 100. 



Desert legion, aloiifr the Kio Colorado on both sides, near Fort Yuma, &c., and on the Gila. 

 Heads rather largo for tlie genus, 3 or 4 lines higli : receptacle broad, nearly flat. Rays said in 

 the l?()tany 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, 'riiroat or expanded jiart of the disk-corolla shorter than the tuljo. Style- 

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

 the same si)e(;ics (vnr. nuda), but with larger rays, collected in 1870 on Carmen Islaml, Lower 

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

 also, ill specimons recently collected by him on Guadalupe Island. This is evidently n winter- 

 animal ; and so apparently nre all the foregoing. 



5. P. leptoglossa, Gray. Cinereous-puberulent : leaves (of bran(;hes) small 

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

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

 iiliform and acute : akenes linear-oblong, hispid-ciliolato : awn of the pappus only 

 one, very slender, barely scabrous. — PI. Fendl. 77. 



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

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

 ably long and narrow cylindrical throat. 



P. Pauryi, p. Aoi.ossa, and P. coiiONOriFOl-lA, Grny, tlie latter witli distinctly white rays, 

 belong to a region further eastward. 



85. DYSODIA, Cav. 



Head many-flowered, with few or numerous pistillate rays or sometimes nono ; all 

 the flowers fortilo. Iiivohicro cyliiulracoons or campanulate, of rather rigid equal 

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

 Keceptacle flattish, naked, often alveolate, fimbrillate, or hirsute. Pays 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 - O-angled or many-nerved. Pappus single, 

 of 10 (or rarely more) firm chally scales -which are deejdy disserted into many rigid 

 scabrous bristles, about eipialling the corolla. — Herbs (all Mexic^'in and N. Ameri- 

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

 or aHernate leaves, and peduncled heads of yellow, orange, or reddish flowers : sr^t- 

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



D. CHRYSANTilEMOiPF.s, Lagasca, common along the waters of tlie Missis-xippi and tlience to 

 Mexico, may approach California by way of Arizona. 



1). Hi-KCKmA, Gray, a Htriking aiid npparenlly Hliiubbv Mpecies, with rounded tcnmte lenlloti 

 and large heads, wa.s discovcitMl at Cajie Han Lucas in Lower California, far beyond our limits. 

 2'he following have ))een found in the State. 



1. D. porophylloides, Gray. T^oosely much liniiiclicd. abmit 2 fci-t high, 

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



