1G6 COMPOSITE. Dich(Etophora. 



ii. 209, referred (along with a species of Perityle and an Achcetogeron') to a section 

 of Boltonia. 



D. campestris, Gkat. A small and Daisy-like winter annual, at first acauleseent with a 

 scapiform peduncle (1 to 3 inches high), at length with leafy branches terminated by a slen- 

 der mouocephalous peduncle: lea\es spatulate, entire, suniewliat hirsute; head 2 or .'J lines 

 high, the ovate disk soon surpassing the involucre; rays 16 to 20, apparently white or rose- 

 color. — PI. Fendl. 7.3, perliaps excl. syn. Brafhi/rome ? :raitt/iurotnotf/cs, Torr. & Gray, Fl. 

 ii 190, the specimen of which is too young for determination. — Southern borders of Texas, 

 Berlandier (no. 1465, specimen too young), Havard, in fruit. (Adj. Mex., Gregg, Palmer.} 



42. BOLiTONIA, L'Her. (James Boito7i, an English botanical author.) 

 — Perennial and leafjr-.stemmed herbs (wholly of the I.'uited State.s), A.ster-like, 

 glabrous, glaucescent, mostly tall ; with striate-angied stems, entire se.ssile leaves 

 commonly becoming vertical by a twist at base, rarely decurrent ; and with rather 

 showy heads ; the numerous rays white, purplish, or violet ; fl. autumn. — Sert. 

 Angl. 27 (with figures cited which were never ijublished) ; DC. Prodr. v. 30] ; 

 Benth. & Hook. Gen. ii. 20'J, excl. § Asteromaa, Blume, which jiasses into C(aU- 

 meris, and also § 3, which is a mixture. Wings of the akene broadish and thin, 

 narrow and tliickish, or obsolete in the same species, or even in the same head. 



* Stcm« (2 to 7 feet high) paniculately much branched and slender: heads small; the disk only 

 about 2 linos high and wide. 



^ B. diffusa, Ell. Lower leaves lanceolate ; upper linear, those of the loose and almost fili- 

 furni flowering.brau'Jics or branchlct.s becoming linear-subulate and minute: rays mostly 

 white, barely 2 lines long- involucre a.s in the next, but the liracts more numerous and un- 

 equal. —Sk ii. 400; Hook, Comp. Bot. Mag. i. 97 ; DC. 1. c. & Torr & Gray, 1. c, excl. syn. 

 Bot Mag. —Low grounds, South Caroliua to Texas and along the Mississippi region north 

 to Illinois. 



* * S'eras (2 to 8 feet high) simple and more cymose-panicnlate at summit, leaves broadly lan- 

 ceolate or the uppermost linear-lanceolate- heads sliort-peduncled, larger; the disk in fruit a 

 third to half an inch in diameter: rays 4 to G lines long, 



»-B. asteroides, L'Hek. Bracts of the involucre lanceolate, acute, mostly greenish : rays 

 from white to purplish or pale A'iolet-color • setulose sijuamella? of the pappus mostly nu- 

 merous and conspicuous, the two awns sometimes wanting or obsolete, more commonly 

 present and little shorter than the akene. — Mnincaria asicrmdes, L Maut. 11 6. AJ. g/asti- 

 jUia, Hill, Hurt. Kew. 19, t. .3. Cliri/sdntliemiim Ca'-oliniaiiiim, Walt. Car. 204. Boltonia 

 giastifoiia & B. asteroides, L'Her. 1. c. ; .Miehx Fl ii. 132; Willd. Spec. iii. 2162, Sims, Bot. 

 Mag t, 2381 & 2554; DC, 1, c — Mtnst or wet ground along streams, Pennsylvania to Illi- 

 nois and Florida, The awnless form (B. asteroides) is not constant to this character, but 

 i^ commonly smaller, and with fewer and smaller heads. 



■==- ^ Var. decurrens, Enoel.m in herb. A large form (in cultivation 7 or 8 feet liigh), 

 with leaves alate-decurrent on tlie stem and even the branches ; the wings .sometimes ending 

 below in a free and subulate point : pappus-awns slemler. - Missouri, Eqiiert. 

 B. latisquama, Gray, Heads rather larger and more showy rays blue-violet , bracts of 

 the involucre oblong to ovate, obtuse or mncronate-apiculate . awus'of the paiijuts uniformly 

 present and conspicuous, the setulose squamellre small — Am .Four, Sci. scr 2. xx.xiii 238. 

 — Kansas and W, Missouri, near the mouth of the Kausas i;i\er, Parry Xow not rare in 

 cultivation, the handsomest species. 



Var. oocidentalis. Heads rather smaller: rays white, — River-bottoms of Tuion 

 Co,, Eastern Oregon, Cnsirl,-. 



43. TOWNSfiNDIA, Ilook. (David Townsenr/. botanical associate of 

 Dr, Darlington of Penn.) — Depressed or low maiiy-st.-ramed herbs (of the 

 Rocky .Mountains) ; with from linear to spatulate entire leaves, and/'omparatively 

 large heads, resembling' those of A.ster ; the numerous rays from violet or rose- 



