Grinddia. COMPOSIT.E. 117 



summer. — Gesel. Nat. Fr. Berl. :\r:ig. 1807, 259 ; Dunal, Mem. Mus. Par. v. 48 ; 

 DC. Prodr. V. 0L4 ; Beutli. & Hook. Gen. ii. 2.jl). Bemetriu, Lag. JJonia, E. Br. 

 Atirelia, Cass. 



G. coRoxopirdLiA, Lehm., of Jlexico, is XanthocepMum centauroides, Willd., the original of 

 that genus. 



(;. AXGUSTiFOLiA, DC. iu Dunal, founded on a drawing only, is not identified ; probablj- of 

 some otlicr genus. 



(;. cosTATA, Gray, Proc. Am. Ac;i(l. xvii. 208, i.s a northern :^rexican species, allied to 

 G. s<iuarrosa and G. subdecurrens, with lunate-gibbous 10-ribbed akenes. It may reach the U. S. 

 borders. 



* Stem or branches (at least above) and sometimes the leaves pubescent: ravs very numerous; 

 awns of the pappus 2 or 3, sometimes solitary: plants a foot to a yard high. 



+- Atlantic and ilexitan species: root in U. S. annual or biennial, perhaps more enduring in 

 Mexico; akenes with no terminal border or teeth. 



G. inuloides, Willd. 1. e. Pubescence minute or short : leaves from oblong to lanceolate 

 or almost ovate, serrate down to the partly clasping or broad base with cluse-sct and often 

 gland-tipped salient teeth : involucre glabrous (half-inch or more in diameter), at length 



. squarrose: akenes short and turgid (the length barely double the breadth), with rounded- 

 truncate summit and small areola, smooth or becoming corky-rugnse t^an^^erse]v. — Dunal, 

 1. c. 50, t. 5 ; Bot. Reg. t. 248 ; DC. Prodr. v. 315; Hook. Bot. Jlag. t. 37-37 ; Torr. & Gray, 

 1. c, excl. yai. $. G. pubescens, Xutt. Jour. ..\cad. Philad. vii. 74. Inula serrata, Pers. .'^\n. 

 ii. 451 . Demetria spatlmlata, Lag. Elench. Madr. 1 814, 20. — Plains of Arkansas and Texas ; 

 common. (Mcx.) 



Var. microcsphala, Gkay. Smaller, more branching : heads only half as large : 

 akenes more commonly rugose-thickened but sometimes smooth : involucral bracts usuallv 

 shorter and closer : the extreme forms seeming very distinct from the type, but connected 

 by intermediate states. — Bot. ilex. Bound. 81. G. microcephala, DC. Prodr. v. 315. — 

 S. Texas, first coll. by Berlandier. (Jlex.) 



H— H— Pacific species: root perennial but sometimes flowering the first year: akenes truncate and 

 with a prominulous irregularly undulate or obscurely 3-5-toothed border around the terminal 

 areola: pappus-awns stouter and more corneous, flattish: involucre in the same species either 

 naked or surrounded by spreading foliaceous bracts passing into leaves. 



G. hirsiitula, Hook. & Acx. A foot or two high, simple or sparingly branched, villous- 

 hirsnte, or glabrate, sometimes even tomentose wlien young : leaves rather rigid and com- 

 monly serrate with rigid salient teeth, in the typical plant oblong, or lower ones spatulate 

 and oiituse (cauline inch or two long and about half-inch wide), upper with parth- clasping 

 but not widened base, varying however to lanceolate and acute : heads solitary or few ; in- 

 volucre half-inch in diameter ; its proper bracts with or without subulate-attenuate squarrose 

 tips, and with or without the surrounding loose foliaceous bracts, which may surpass the 

 disk. — Bot. Beech. 147, 351 ; DC. Prodr. vii. 278 ; Torr. & Gray, 1. c. ; Graj-, Bot. Calif. 

 i.,103. G.rubricaulis, DC. Prodr. v. 316. — Hills and open grounds, California from ilon- 

 terev northward,- where it seems to pass into or is not well discriminated from the following ; 

 first coll. by Douglas. 



G. integrifolia, DC. A foot to a yard high, the taller plants corvmbosely branching at 

 summit and bearing several or numerous heads : pubescence soft-viUous, sometimes sparse 

 or vanishing : leaves of soft texture, commonly entire, occasionally serrate ; cauline lanceo- 

 late, 3 or 4 inches long, mostly tapering from a broad base to an acute or acuminate apex ; 

 radical spatulate and obtuse : bracts of the involucre with mostly elongated setaceous-subulate 

 points to the bracts- — Prodr. v, 315; Torr. & Gray, 1. c. G. stricta, DC. Prodr- vii. 278. 

 G. virgota, Xutt. Trans. Am. Phil- Soc. vii. 314, slender form. Donia inuloides, var.. Hook. 

 PL ii. 25. — Moist or shady ground, Oregon to Britisli Columbia, chiefly toward the coast. 

 Varies greatly in open ground having leaves of firmer texture, the lower sometimes coar^ely 

 serrate, even the upper barelv acute : on the shores of British Columbia occurs a low form, 

 glalirate and thickish-leaved, which perhaps too nearly approaches G. cuneifolia. 



* # Whole herbage glabrous: stems equably leafy, a foot or two high: root mostly short-lived 

 perennial, but sometimes annual in the same species: leaves firm or rigid. 



