106 



PLANT^ WRIGHTIAN^ 



Y, 



than in Grcgg s former specimens, on which the specics was founded. Ray-achenia 



with two very small teeth, or sometimes none. -^r^ , -n . ^ n., 



324 Z. (DiPLOTHRix) ACERosA. Diplothrix acerosa, VC. ! Frodr. 5. v. 611 



Hills heyond the Pecos ; Aug. - Stems woody, fastigiately much branched and 

 tufted a span hish, the branches crowded with the setaceous leaves, which are 



mostly six or cight lines long (in Berlandier's as well as in Wrighfs specimens) 

 Heads much as in Z. grandiflora, but smaller, and only half, or less than half, 



Involucre three lines long, narrow, on a peduncle of about the same 

 scales ciliatc. Eays four or five, at first apparently light yellow, be- 

 papcry and ochroleucous or sulphur-color, as in the t^^^ foregoing species 

 Hay-achcnia often biaristulate ; and 



their si: 

 lcngth; the 



likewise produced 



th or short awn. Tappus in the disk-flowers of one, two, or rarely three 



slcnder awns, • more or less unequal, or in some of the exterior achenia reduced to 



squamellate teeth. 



32.3. Z. (Heterogyxe) anomala (sp. nov.): hispidulo-scabra ; caulibus e basi 



frutesccnle pluribus adscendentibus spithamseis foliosis apice monocephalis ; foliis 



anguste linearibus acutis rigidulis trinerviis hispidulo-ciliatis, summis pedunculo lon- 



gioribus ; floribus foemineis 5 - 6 in ambitu corolla omnino destitutis, seu 1-3 ligula 



pei 



acheniis radii et disci soepissime biar 



tis. (Tab. X.) — Prairies beyond the Pecos ; Aug. (Also gathered by Berlandier, 

 January, 1828, in Xorthern Mexico.) — Plant with nearly the foliage and mode 

 of growth of Zinnia grandiflora, Nutt, but with larger heads and inconspicuous 



gules, when these 



Involucre nearly half an inch long, cylindr 



oblong, many-flowercd ; the scales rather thin, marked with a greenish line 

 below the sphacelatc-scarious margin. The yellow ligules, when present, one or two 

 lines long, usually shorter than the achenium and the style. Receptacle, disk- 

 flowers (orange-colored), &c., as in Zinnia; the chaiF entire, obtuse. Achenia of 

 the ray triangular-obcompressed, with the margins produced into two paleaceous 

 teeth or subulate short awns ; of the disk compressed, commonly two-awned ; but 

 in some flowers the awns are nearly obsolete ; in others there are three or four 

 (when the achenium is quadrangular-compressed), one from each angle, or rarely 

 five or six. 



X Z. A2;omala, var. magis hirtella ; floribus radii omnibus ligulatis ; ligulis aut 

 brevissimis ovatis aut anguste oblongis disco sequilongis. — Between Texas and El 



Paso; coll. of 1851. 



326. Lepachys columnaris, 



Prairies, Westcrn Texas ; May 



& 



Torr..&^ Grau, Fl. 2. p. 315 



327. L. coLUMNARis, var. Tagetes. Rudbeckia Tagetes, James in Long, Exped, 2 

 p. 68. Obeliscaria Tagetes, DC. Vallcy of the Eio Grande below El Paso ; Sept 

 AIso in the coll. of 1851. — This is the same as Fendler's No. 4:24 ; and it was alsc 

 gathered by Wislizenus between Santa Fe and El Paso. It holds its characten 

 very well, and has not yet occurred with large rays, nor with an elongated disk 

 80 that it is perhaps a distinct species. 



L. (LorHocnxN-A) peduncularis, Torr. §• Gray, Fl. 2. p. 315. Near Austin 

 Texas. 



