TI. 



■PLANT^ WRIGHTIANJE. 



95 



in the Cambridge Botanic Garden, from seeds collected by Mr. Wright in Sonora. 

 The cultivated plants are one oi two feet high, much branched and bush-Uke, 

 annual : the cauline leaves pinnately 5 - 7-partcd, or the upper 3-parted ; thc ra- 

 meal mostly entire, narrowly linear. Involucre somewhat clavate and quadran- 

 gular, 3 lines long, nearly equalling the flowers, subtended with one or two small 

 bractlets : the scales 4 or 5. obovate. the 



r 



scarious tips tinged with purple. Corollas 

 yellow, a line and a half long; those of the hermaphrodite flowers 4-5-toothed; 

 that of the solitary female flower when present not longer than the others, and 



perfectly ligulate; being 2-lipped 



and 



ligule, involute, 2 - 3-toothed at the apex, about the length of the style. Achenia 

 2 lines in length, more or less villous or glabrate on the four sides, very strongly 

 villous on the angles. Palese of the pappus, inchiding the short projecting awn, 

 not loDger than the corolla, somewhat erose, the obtuse apex often splitting away 

 from the base of the awn, so as to appear " trifid." — I cannot doubt that this is 

 De Candolle's Hopkirkia, which must be reduced to SGhkuhria, as remarked in Pl. 

 Fendl. p, 96. The Schkuhria Wislizeni (to which belongs Galeotti's No. 2049), 

 which I there characterized, is to this exactly what S. abrotanoides is to S. octo- 

 aristata ; and the following, which I unwillingly characterize as a specics, difiers 

 only in its rather small, entirely nerveless and awnless pappus. 



S. Wrightii (sp. nov.) : capitulis 3 - 5-floris, flore unico focmineo, ligula brevis- 

 sima imperfecta ; achcniis ad angulos villosissimis ; pappi paleis 

 conformibus enerviis muticis corolla paullo brevioribus. — On tl 

 serted Rancho, Sonora; Sept. (1254.)— This is to Schkuhria Hopkirkia and 

 S. Wislizeni exactly what S. isopappa, Benth. is to S. octo-aristata and S. abrota- 

 noides. It is therefore highly probable that the diflerence in the pappus, although 

 constant in the specimens, is not of specific importance ; and that the three Peru- 



8 obovato-oblongij 

 e Sonoita near De 



species should be viewcd as forms of S. ab 



th 



plants as analogous forms of S. Ilopkirkia. S. virgata, DC, with its very uncqual 

 pappus and nearly naked achenia, is distinct from either.* 



Baiiia absinthifolia, Benth., var. dealbata, Grai/, Pl. Wright. p. 121. Sandy 

 ,vallcy in the Mimbres mountains ; July : near Frontera ; March. (1255.) 



B. BiTERNATA (sp. uov.) : anuua, cinereo-puberula ; caule erecto gracili supcrne 

 corymboso-paniculato, ramis ohgocephalis ; foliis alternis petiolatis biternatisectis, 

 segmentis linearibus obtusis sa^pius 2 - 3-lobatis ; involucro laxo disco brcviore, 

 squamis 12 obovatis obtusis ; acheniis hirsutis ; pappo e paleis 12-14 unincrviis, 

 fl. exteriorum obovatis muticis tubum corollse ada^quantibus, fl. interiorum oblongo- 

 lanceolatis aristatis corolla subdimidio brevioribus. — Gravelly hills near Ojo de 

 Gavilan, New Mexico ; Aug. (1256.) — Plant one or two feet high, loosely and 

 paniculately branched ; the heads corymbose, on peduncles of an inch or less in 

 length. Segments and lobes of the leaves a line or lcss in width. Iiivolucre as in 

 B. ambrosioides and B. pedata ; the scales about 3 lines in length, mcmbranaceous. 



Achyropappus anthemoides, H.B.K. is wholly intcrmediate between Schkuhria and Bahia, Lag., 

 and will ccrtainly fall into thc one or the othcr genus. 



