82 PLANTS WRIGHTIAN^. T. 



herb. Hook.), with the flowering branches and the pedicels elongated and filiform, 

 is surely the same as Nuttall's Houstonia tenuifolia. 



241. Hedyotis (Houstonia) humifusa, Gray, PI. Lindh. 2. p. 216. Sandy soil 

 near Austin, Texas; also west of the Pass of the Limpia ; Aug. "Flowers 

 white." 



COMPOSITE. 



242, 243. Vernon lA Jamesii, Torr. 8f Gray, Fl. 2. p. 58. Bottom of the San 

 Pedro River ; also beyond the Pecos, and on the Limpia ; Aug. — Under these 

 numbers are distributed several forms of one species, of which those with the larger 

 and more turbinate heads agree well with V. Jamesii (although the leaves are often 

 somewhat serrulate), while those with smaller heads approach V. fasciculata. The 

 corymb is simple and small, and the stems only from ten to eighteen inches high. 

 It is rightly placed between V. fasciculata and V. angustifolia.* 



244. Pectis (Pectidopsis) angustifolia, Torr. ; Gray, PL Fendl. p. 61 ; var. 

 suBARisTATA : pappo in fl. exterioribus nonnuUis ssepius 1 - 2-aristulato. — Pectis 

 fastigiata. Gray, PL FendL p. 62. Valley between the Pecos and the Limpia ; 

 Aug. — The awns of the pappus, which are almost always single in these specimens, 

 are found in only one or two of the exterior flowers of each capitulum, and in many 

 they are altogether wanting ; — showing not only that De Candolle's genus Pecti- 

 dopsis is untenable, but that my Pectis fastigiata can be nothing else than a more 

 or less aristate variety of P. angustifolia. — The whole of Pectis (meaning thereby 

 the Eupectidese of De Candolle) greatly needs a revision, from adequate materials, 

 when it will be found that some of the characters used as specific are variable, 

 especially the number of awns or palese, and the difi'erence between the pappus of 



* A synonym of this last is Liatris umbellata, Berioloni, Misc. Bot. 5. p. 13. t. 4. fg. 1 ; from Ala- 

 bama specimens. 



Vernonia Rugeliana, Shuttleworth (N. Carolina, Rugel) appears to be only the ordinary form of V. 

 Noveboracensis. 



No. 238 of Coulter's Mexican collection appears to belong to a very distinct undescribed genus, remark- 

 able among Vernoniaceas for its paleaceous receptacle. The subjoined character is drawn from the spe- 

 cimen in the Hookerian herbarium : — 



BOLANOSA, Nov. Gen. 



Capitulum multiflorum, homogamum, Eequaliflorum ? Involucrum hemisphsericum, extus laxe lanatum ; 

 squamis oblongo-lanceolatis membranaceis appressis apice subcoloratis (purpureis) inappendiculatis, inti- 

 mis disco subsequalibus. Receptaculum planiusculum paleaceum ; paleis invol. squam. referentibus con- 

 duplicatis, singulis florem involventibus. Corollse purpurese, marginales (ampliatfe .') reflexes. Styli etc. 

 Vernoniacearum. Achenia turbinata, sericeo-hirsuta. Pappus duplex rigidus, exterior e paleolis squa- 

 mellatis plurimis lineari-lanceolatis ovario sequilongis, interior e setis aristEeformibus complanatis sursum in- 

 crassatis pluriserialibus corolla paullo brevioribus, utrisque crebre denticulatis. — Herba floccoso- 

 lanata; caule (seu ramo) erecto apice capitula plura (|-poll. diametro) corymboso-congesta gerente ; fo- 

 liis alternis ovato-oblongis utrinque acutis subsessilibus penninerviis integris supra mox glabratis .' subtus 

 dense cano-lanatis. 



B. CouLTEKi. — Bolanos, Northern Mexico, Coulter. — Diflfert a Vernonia receptaculo paleaceo, pappi 

 setis seu paleis rigidis incrassatis, ab Heterocoma squamis involucri baud nervatis, pappo externo squa- 

 niellato, etc. 



