﻿PLANTS FENDLERIAN^. 73 



S 343. G. (Hemiachyris) sph^rocephala (sp. nov.) : humilis, diflbso-iamosissiina : 

 ramulis divergentibus foliosis capitula solitaria majuscula gerentibus ; foliis linearibus uni- 



60) e tubo gracili infundibuliformes, limbo 5-lobo. Styli rami complanati, appendice triangular] acutiuscula 

 terminati. Achenia oblonga, compressa, hirtella, radii subtrinervia, disci binervia, nervis marginalibus. Pap- 

 pus conformis, duplex, e paleis coriaceis 5 oblongis eroso-truncatis achenio brevioribus, et setis capillaribus 

 scabris totidem cum paleis alternantibus corollam subaquantibus, constans. — Herba annua biennisve, pumila, 

 Bellidis-facie, cinereo-hirsuta ; caulibus e basi simplicibus monocephalis ; foliis obovatis vel spathulatis integer- 

 rimis, caulinis parvulis ; capitulo majusculo ; ligulis albis ; disco luteo. 

 S D. bellioides. — Monterey and Buena Vista, Dr. Gregg, Dr. Edwards, and Major Eaton : apparently 

 in dry soil ; flowering in March. — Plant 2 or 3 inches high, branched from the base; the stems simple or 

 nearly so, leafy to the top. Radical leaves an inch long, including the tapering base or petiole ; the cauline 

 successively smaller, sometimes minute. Involucre one fourth of an inch in diameter, pubescent with fine 

 appressed hairs. Rays linear-oblong, about a fourth of an inch in length, the tube (as also that of the disk 

 corollas) slender. — This genus belongs to the subdivision Belliea, DC, where it will stand between Bellium 

 (which it seems to represent in the New World) and Chatopappa. The achenia and pappus are nearly as 

 in Bellis, from which it is distinguished principally by the perfectly flat receptacle, the pluriseriate imbricated 

 involucre, the manifest tube to the corolla, and the leafy stems. From Chaetopappa it differs in the many- 

 flowered heads with a hemispherical involucre, the flowers all fertile, in the flattened and 2-nerved achenia, 

 and the large and thickish scales of the pappus. To avoid an increase of synonymy in case the discovery of 

 intermediate forms should invalidate these distinctions, I have taken up for the name of this genus a super- 

 seded synonyme of Choctopappa. 



DICH^TOPHORA, Nov. Gen. 



' Capitulum multiflorum, radiatum, heterochromum ; fl. radii ligulatis, uniseriatis, faemineis ; disci tubulosis 

 hermaphroditis. Involucrum subuniseriale disco brevius ; squamis aqualibus, lineari-lanceolatis, herbaceis, 

 margine subscariosis. Recepiaculum ovato-conicum, nudum. Ligula 16-20, oblongo-lineares. Corolla- 

 disci 5-denlata3. Styli rami appendice triangulari-lanceolata complanata terminati. Achenia (lateraliter) 

 plano-compressa, ala suborbiculari cincta, marginibus cum disco pilis glochidatis hispidissima. Pappus radii 

 et disci conformis, e squamellis minimis paucis (8 - 10) basi coroniformi-subconcretis, et setis tenellis subula- 

 tis achenio dimidio brevioribus, constans. — Herba annua, pumila, caulescens, pilosa, Bellidis integrifolia 

 facie; caulibus diffusis apice nudo monocephalis; foliis spathulatis integerrimis ; ligulis albis roseisve ; disco 

 flavo. 

 / D. campesteis. — (Brachycome xanthocomoides ? Torr. Sf Gray, Fl. 1. p. 190.) Around Monterey, 

 New Leon, and on the Rio Conchos, Chihuahua (the latter a more slender and less hirsute form), called 

 " Manzanilla del campo," Dr. Gregg. — Stems branched from the base, 3 to 6 inches long. Heads like those 

 of Bellis integrifolia, but the disk more conical in fruit : the receptacle longer than the involucre. Achenia 

 half a line long, obovate-orbicular ; the wing on each side as broad as the disk, strongly and densely fringed 

 with minutely glochidate bristles : these are longer than the subulate squamella; of the pappus, which they 

 nearly conceal, but scarcely half the length of the two slender and naked subulate awns. — A comparison 

 with the fragment of the Texan specimen in my possession convinces me that this is the plant which is doubt- 

 fully referred to Brachycome xanthocomoides, Less., in the Flora of North America ; the characters of which 



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