122 PLANTS AVRIGHTIAN^. V. 



year 1848, and have had it in cultivation for three or four years in the Cambridge 

 Botanic Garden ; where it proves to be one of the handsomest annuals of the fam- 

 ily, of very neat foliage, and producing a succession of large, bright golden-yellow, 

 long-peduncled capitula during the whole summer. The pappus resembles that of 

 a Gaillardia, except that it is nerveless and awnless. 



382. Helenium tenuifolium, Nutt. in Jour. Acad. Philad. 7. p. 66 ; Torr. 8f 

 Gray, Fl. 2. p. 385. Bed of the Limpia, Aug. 



383. AcTiNELLA scAPosA, Nutt. ; Torr. §• Gray, Fl. 2. p. 382. Hills of the Eio 

 Frio; June. Also, the villous form, in the collection of 1851. 



384. A. LiNEARiroLiA, Torr. ^ Gray, I. c. ; Gray, PI. Lindh. On the Leona ; 

 June. — A larger and more strict form, 18 inches high, with larger capitula, occurs 

 in the collection of 1851. 



385. A. ODOEATA, Gray, PI. Fendl. p. 101, adnot. Hymenoxys odorata, DC. ! 

 Prodr. 5. p. 661 ; Beless. Ic. Sel. 4. t. 42. Low banks of the Rio Grande, below 

 El Paso ; Sept. — Berlandier's specimens were collected between Laredo and Bexar, 

 Texas, according to the ticket in Hooker's herbarium, &c. — A. chrysanthemoides, 

 H. B. K. ! is a close congener of this species ; as is A. integrifolia, H. B. K. ! (Oxy- 

 lepis lanata, Benth. !), which is omitted by De CandoUe, of the entire-leaved species. 

 Hymenoxys anthemoides, Cass, and H. Hsenkeana, DC, although rayless, will form 

 on this account only a section (Hymenoxys) of Actinella. Cephalophora radiata, 

 Hook. Sc Arti. is, I believe, no more than a variety of A. heterophylla, Pers., which 

 I think sometimes wants the rays. C. fruticosa, HooJc. Sf Am. (which is also C. 

 Doniana, Hook. 8f Am.) is a distinct species, and very likely the C. radiata of 

 Lessing. These being removed, Cephalophora will be restricted to De Candolle's 

 first section, with globose heads and a reflexed linear involucre. 



SAETWELLIA, Nov. Gen. 



Capitula pluriflora, conferte fastigiato-corymbosa, heterogama ; fl. radii ligulatis 

 foemineis 3-5; disci 9-12 tubulosis hermaphroditis. Involucrum disco brevius, 

 5 - 6-phyllum, squamis ovalibus membranaceis sequalibus. Beceptaculum subpla- 

 num nudum. Ligulee ovales, corollas disci (limbo cyathiformi 5-fido) baud super- 

 antes. Styli rami fl. disci brcA^es, complanati, revoluti, apice truncati. Achenia 

 teretia, 10-costata, pappo calyculato integro margine multi-denticulato, tubum pro- 

 prium corollse disci adtequante, coronata. — Herba erecta, multicaulis, pedalis, 

 glabra ; radice annua 1 foliis oppositis filiformi-linearibus integerrimis impunctatis ; 

 capitulis parvulis breviter pedicellatis ; floribus aureis. 



386. Sartwellia Flaveri^. (Tab. VI.) — Prairies of the Rio Seco, Texas, and 

 mountain valleys and plains of the Pecos, and base of the Guadalupe Mountains ; 

 July - Oct. — The figure and generic character render a detailed description of this 

 plant unnecessary. It is entirely different from any published genus known to me, 

 and is chiefly remarkable from its invalidating the distinctions of the subtribe 

 Flaveriece, to which, on account of its whole habit and general characters, I am 

 obliged to refer it, notwithstanding the pappus and the pedicellate (not glomerate 

 nor strictly fascicled, though crowded) capitula. I take pleasure in dedicating the 



