﻿PLANTS FENDLERIANjE. 103 



species between the Wallamet River and California ; and a low form, with the heads even 

 smaller than in Fendler's plant, exists in Fremont's third collection, apparently from the 

 interior of the south part of Oregon. — Mr. Fendler gathered a monstrous state of this 

 species, with the flowers of the head all pedicellate, so as to form an umbel, the pappus 

 transformed more or less into bract-like lobes, the corolla prolonged and more herbaceous, 

 the anthers distinct, &c. 



squamis totidem parvis truncatis 2-3-fidis alternantibus. — California, Fremont (1846). — Heads as large as 

 those of Burrielia gracilis ; the branches of the style tipped with a similar capitate cone ; while in B. micro- 

 glossa and B. gracilis the appendage is more slender. 



A more striking case of diversity in the pappus of plants which are otherwise almost undistingnishable 

 occurs in Layia, Hook, fy Am. (Madaroglossa, DC. ; Eriopappus, Am.), Callichroa, Fisch. fy Mey., Calliglossa, 

 Hook. Sf Am., and Calliachyris, Torr. fy Gray, which it is becoming evident should all be viewed as sections 

 merely of a single genus, to which perhaps even Oxyura, with no pappus at all, will ultimately be added. 

 Thus combined, the sections of the genus would be characterized thus : — 



LAYIA, Hook. 4- Am. Bot. Beech, p. 148 (non p. 182). 



§ 1. MADAROGLOSSA, DC. (Eriopappus, Am.) Pappi arista? setiformes, basin versus pilis tenuissimis 

 praslongis lanato-plumosse seu villosse : receptaculum inter flores radii et disci tantum paleaceum. 



Layi^; sp., Torr. Sr Gray, Fl. 2. p. 393, excl. no. 1. — L. elegans, which has been gathered by Coulter, 

 Fremont, Hartweg, &c, occasionally is destitute of the crisped and interlaced wool of the inside of the pap- 

 pus, which is then consequently less villous than in the other species, and connects this typical group with 

 the third section. 



§ 2. LAYIA, Hook. fy Am. Pappus ut in § 1 : receptaculum inter flores disci exteriores paleaceum. 



L. gaillardioides, Hook. Sf Am. 1. c. I have seen this species only in a collection made in California 

 by some Russian botanist. 



§ 3. CALLICHROA, Fisch. 8f Meyer. Pappi arista? ut in § 2-3 sed nudse : receptaculum inter flores 

 radii et disci tantum paleaceum. 



L. platyglossa. Callichroa platyglossa, Fisch. 8f Mey. Ind. Sem. Hort. Pelrop. <$- Sert. Pelrop. fol. 

 Sf t. 5 (excl. syn. Madar. heterotr. Hook.). 



Sj 4. CALLIGLOSSA, Hook. 8f Am. I. c. p. 356. Pappus e paleis insequalibus subulato-arisliformibus 

 achenio brevior, basi dilatata pi. m. ciliato-setigera, constans : receptaculum totum paleaceum. 



L. Calliglossa. Oxyura, Lindl. Bot. Reg. (ex parte). Calliglossa Douglasii, Hook. §• Am. 1. c. ; 

 Fisch. &f Mey. Sert. Pelrop. fol. <$- t. 6. — The wild specimens from the Russian collections show well the 

 irregular hairs which fringe the base of the chaffy awns, plainly representing the longer hairs of Layia proper. 



§ 5. CALLIACHYRIS, Torr. Sf Gray. Pappus e paleis (circ. 12 subrequalibus achenium asquantibus) 

 ovato-lanceolatis, apice subulato-cuspidatis, nudis, vel basi pilis longis paucis interpositis : receptaculum etc. 

 Calliglossse. 



L. Fremontii : humilis, diffusa ; tubo cor. disci pubescente. Calliachyris Fremontii, Torr. Sf Gray in 

 Bost. Jour. Nat. Hist. 5. p. 140. California, Fremont (in his second, and also in the third expedition), Hart- 

 weg. — The hairs sparingly interposed between the dilated scales of the pappus (much like those which clothe 

 the achenium, though longer) are similar to the more abundant ones of L. hcterotricha. 



