﻿PLANTS FENDLERIANJE. 99 



y 420. Bahia oppositifolia, DC. Prodr. 5. p. G56. (Trichophvllum oppositifolium, 

 Nutt. ! Gen. 2. p. 167.) In ravines and low places, from eight miles east of Santa Fe 

 to Cold Spring, on the Cimarron; August. (469.) — This long-lost plant has also been 

 recently gathered by Mr. Geyer on the Upper Platte, and by Lieut. Abert on the fron- 

 tiers of New Mexico. The spreading, branching stems, a span or little more in height, 

 apparently rise from a creeping rootstock, and, like the 3-partcd leaves, are cinereous or 

 canescent with a close pubescence, but not tomentose. The uppermost leaves are often 

 alternate. The scales of the campanulate involucre are somewhat lax, as in B. absinthi- 

 folia ; the rays short, but sometimes considerably exserted ; the achenia glabrous and 

 minutely glandular ; and the scales of the pappus have an opaque midnerve (which is 

 unusually distinct and percurrent in Geyer's specimens) and are otherwise more mem- 

 branaceous than in the Eriophylla. — This plant is certainly a congener of the original 

 Bahia of Lagasca, viz. the Chilian B. ambrosioides (on which Nuttall founded his genus 

 Stylesia), and of the Mexican B. absinthifolia. These, with an undescribed Mexican 

 species,* constitute the typical section of the genus, which is to be distinguished from 

 the section (rather than genus) Eriophyllum, Lag. by the loosely campanulate involucre, 

 the scales of which are membranaceo-herbaceous and more or less spreading in fruit ; by 

 the paleae of the pappus of a more membranaceous texture, but thickened at the base 

 or axis or manifestly one-nerved ; and by being merely cinereous or canescent, not 

 clothed with floccose wool. The paleae of the pappus in B. ambrosioides are not alto- 

 gether nerveless, as characterized by Nuttall, but have a more or less thickened axis. 

 Nor can the branches of the style be said to be " terminated by a minute cone," but 

 they are better described by Hooker & Arnott (mi Jour. Bot. 3. p. 321), as bearing a 

 fleshy, apiculate cone, instead of having the truncate styles of Eriophyllum. In fact, 

 the conical appendage of the branches of the style is quite large : in B. oppositifolia it is 

 much the same, but smaller and obtuse ; in B. absinthifolia it is penicillate-truncate with 



by the involucral scales ; and there is no chaff on the receptacle. The generic name accordingly refers 

 to the absence both of the chaffy pappus of Cha:nactis, and of the chaff of the receptacle of the Madieoc. 

 S * Bahia dealbata (sp. nov.) : herbacea, tomento brevi subdecidua? undique argenteo-cana ; foliis ob- 

 longis lanceolatisve integerrimis seu cuneatis trifidis basi trinervatis ; ramis apice 1 -2-cephalis nudis ; invo- 

 lucri squamis obovatis acutiusculis ; pappo corolla? tubum aequante, paleis 7 obovatis obtusissimis scqualibus 

 nervo valido percursis. — Valley between Mapimi and Guajuquilla, and at Cadenas, Chihuahua, Dr. Gregg; 

 April, May. — Stems ascending, 6 or 8 inches long; the base and the root wanting. Lower leaves opposite, 

 the upper alternate, all petioled, an inch long, some entire, others with two spreading and lanceolate or linear 

 entire lobes. Heads, the numerous and rather elongated rays, stvle, &c, nearly as in B. absinthifolia, but 

 the scales of the involucre broader; the whole plant uniformly whitened with a pulverulent tomentum, which 

 may be rubbed off. 



