100 PLANTJE WRIGHTIAN^. VI. 



with a specimen from Nuttall, except that the cauline leaves are repandly toothed 

 in several specimens. It probably passes into S. canus, Hook. 



S. AUREUS, Linn., var. borealis, Torr. ^ Gray, Fl. I. c, verging towards a stout 

 and floccose form of var. Balsamitse (S. Plattensis, Nutt.). Sides of the Organ 

 Mountains, northeast of El Paso ; April. (1415.) 



PsATHYROTES scAPOSA (sp. nov.): spithamtea, arachnoideo-lanuginosa ; foliis fere 

 omnibus radicalibus rotundo-ovatis subcrenatis basi trinerviis petiolatis ; scapo 

 glanduloso stcpe diviso 2- 10-cephalo ; involucri multiflori squamis estriatis oblongo- 

 lanceolatis. (Tab. XIII.) — Stony hills above El Paso ; May : also near Lake 

 Santa Maria; April. (1416.) — Root slender, biennial or annual, producing from 

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

 which are glandular 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, obtuse, obscurely or irregularly crenate, or entire, abruptly con- 

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

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

 under which the surface is more or less viscid. Bracts, subtending the peduncles or 

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

 subcorymbose, 4 lines long. Involucre of about 16 equal oblong-lanceolate scales, 

 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. Receptacle nearly flat, naked. Flowers 30 to 40, all similar and 

 tubular ; the corolla light yellow, viscid. Style nearly as in Arnica. Achenia tur- 

 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 length, rather rigid, scarcely at all denticulate even under a strong lens, 

 persistent. — In Planta; Wrightiana:, j). 86, among the species to be excluded from 

 Brickellia, the Bulbostylis annua of Nuttall is mentioned as an obscure plant of 

 uncertain genus, either of Asteroidese or Senecionidese. Of it I have seen only 

 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 

 merely 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 (-fa^upoTT;?) from which he derived it.* The 



* PSATHYROTES. (Bulbostylis § Psathyrotus, mat.) 

 Capitulum homogamum multiflorum ; floribus tubulosis. Involucrum 1 - 2-senale, squamis ccqualibus. 

 Eeceptaculum nudum, fere planum. Corolla cylindraceo-infundibularis, tubo proprio brevissimo, limbo 

 5-dentato. Antheraj elongatas, demum exsertEe, ecaudatse. Styli rami subcompressi, lineis stigmaticis 

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

 pilosus, corolla dimidio brevior, parum copiosus ; setis tenuibus rigidulis vix scabris valde ina;qualibus. — 

 Herba; Neo-Mexicana; monocarpicre, nanse, glanduloso-viscosas ; foliis alternis ovatis vel cuneatis ; flori- 

 bus pallide flavis. 



1. P. ANNUA. Bulbostylis (Psathyrotus) annua, Nutt. in Jour. Acad. PhUud. n. ser. 1. p. 179. 



2. P. SCAPOSA. Vide supra. 



