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PLANT.E WRIGIITIAN^. 



YI. 



spccimen from N 



toothed 



111 scveial spccimcns. It probably passes into S. canus, Hoolx 



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§' Grmj, Fl 



a stout 



and floccose hvm of var. Balsamitce (S. Plattensis, Niitt). Sides of the Organ 

 Mountains, northcast of El Paso ; April. (1-115.) 



PsATiiYROTES scATOSA (sp. nov.): spithamsca, arachnoideo-Ianuginosa ; foliis fere 

 Dnmibus radicalibus rotuiido-ovatis subcrcnatis basi trinerviis petiolatis ; scapo 

 [^hmduloso saepe diviso 2- 10-cephalo; involucri multifiori snuamis estriatis oblongo- 



lanccolatis. (Tab. XIII.) — Stony hiUs above El Paso ; May : also near Eake 



Santa ^NEaria; ApriL (141C.) — Iloot slender, biennial or annual, producing from 

 one to several scapes or nearly leafiess flowering stems, from 3 to 6 inches high, 

 which are glanduhir and viscid, as are the peduncles and heads. Leaves all.radical, 

 or approximated on very short and forking stems (the subcauline ones alternate), 6 

 to 18 lines long, obtusc, obscurely or irregularly crenate, or entire, abruptly con- 

 tracted into a petiole as long as the blade, clothcd, as well as the base of the stem, 

 with a loose and white arachnoid tomeiitum, which is partially deciduous with age, 

 under wdiich the surface is more or lcss viscid. Bracts, subtending the peduncles or 

 branches of the scape, inconspicuous and lincar, one or two lines long. Heads 

 subcorymbose, 4 liucs long. Involucre of about 16 equal oblong-lanceolate scalcs, 

 which are nearly in a single series, membranaceous but greenish, flat, not striate, 

 obscurely veiny by transmitted light, rather obtuse, viscid-pubescent, shorter than 

 the flowers. Eeceptacle neaiiy flat, nakcd. Flowers 30 to 40, all simiL^r and 



tnbular : the corolla liarht 



Style nearly as in Arnica. Achenia 



Brickellia, the Bulbostylis annua of Nuttall is mentioned 



I 



binate, obscurely pentangular, villous. Pappus shorter than the achenia, and only 

 about half the length of the corolla, fine and capillary, copious, the bristles very 

 unequal in lengtli, rather rigid, scarcely at all dcnticulate even under a strong lens, 

 persistcnt. — In Plantce Wri(/hfia?ice, p. 86, among the species to be excluded from 



as an obscure plant of 

 uncertain genus, either of Asteroideae or Senecionideae. Of it I have seen only l 



a poor specimen in the Hookerian herbarium, from which I took some florets for 

 examination ; which show that it and the plant now under consideration are un- 

 doubted congeners. As they cannot be associated with any genus known to me, I 

 mcrcly raise to generic rank the section under which Nuttall characterized his 

 Bulbostylis annua, changing a single letter in the termination of the name, that it 

 may correspond to the Greek word (f a^oT???) from which he derived it.* The 



• PSATHYEOTES. (Balbostylis § Psathyrotus, Nutt.) 



CapltLilum homogamum multiflorum ; floribus tubulosis. Invokicrum 1 - 2-senale, squamis sequalibus. 



Kcceptaculum uudum, fere planum. Corolla cylindraceo-infundibularis, tubo proprio brevissimo, limbo 



5-dentato. Antherte elongattt?, dcmum exsertge, ecaudata). Styli rami subcompressi, lineis stigmaticis 



obscuris percursi, cxtus hirtelli, cono inconspicuo terminati. Achenia oblongo-turbinata, villosa. Pappus 



pilosus, corolla dimidio brevior, parum copiosus ; setis tenuibus rigidulis vix scabris valde inrequalibus. 



Herba; Xeo-.Muxicana} monocarpicai, nana^, glanduloso-viscoscc ; foliis alternis ovatis vel cuneatis ; flori 

 bus pallide flavis. 



1. P. A^'NCA. Bidbostylis (Psathyrotus) annua, Nutt. in Jour. Acad. Philad. n. ser. 1. p. 179. 



2. P. scAPosA. Vide supra. 



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