92 



PLAMTiE WRIGUTIANJE. 



vr. 



XiMENESiA ENCELioiDEs, Crtv., fcre B. CANA, DC. ; Gvay^ Pl. Wright, p. 112. 

 From Eagle Spriiigs to the Rio Grande below El Paso ; June. (1238 bis.) 



X. ENCELioiDES, vai'. NANA : caulibus depressis vel assurgcntibus vix spithamgBis ; 

 ramis monocephaUs ; ligulis parvis discum vix superantibus ; acheniis dense pubcs- 

 centibus pachypteris. — Around the dwellings of Prairie-dogs (Pseudostoma Lu- 

 doviciana), betvveen the Limpio and the Rio Giande ; June. (1407.) — Here this 

 dwarf variety abundantly occurs, unmixed with the ordinary state of the species. 



Vehbesina PODOCEriiALA (sp. nov.) : humilis, hispida ; caulibus herbaceis pluri- 

 mis e basi suffrutesccnte simplicibus vel simpliciter ramosis teretibus ; foliis oppositis 

 oblongo-ovatis serratis tripli - quintuplinerviis reticulatis basi rotundata subsessiUbus 

 haud decurrentibus ; pedunculo solitario elongato monocephalo ; involucro hemi- 

 sphserico disco breviore biseriali, squamis ovatis, exterioribus 5 foliaceis obtusissimis 

 laxis, interioribus 10 chartaceis subacutis ; lip-ulis circ. 10 oblons-is exsertis ; ache- 



niis exalatis, radii triquetris muticis, disci insequaUter biaristatis vel arista unica 

 abortiva. — Mountain valleys between the San Pedro and the Sonoita, and in a ra- 

 vine at Santa Cruz, Sonora ; Sept. (1239 bis.) — Plant 10 to 20 inches high ; 



thc stems hirsute or hispid and scabrous, slender, not at all wineed. Leaves rather 



thin in texture, 2-3 inches long, 12 to 20 lines wide, acute or obtuse. Peduncles 6 

 to 10 inches long. Head nearly half an inch in diameter. Flowers golden-yellow. 

 Ligules linear-oblong, 4 lines in length, usually styliferous aud fertile ; some of 

 thcm occasionally sterile or even neutral. Achenia destitute of any coroniform or 

 squamellate pappus : those of the ray obscurely 3-toothed at the angles ; of the 

 disk with short and rather stout erect awns. — This is evidently related to V. Capi- 

 taneja, Nees in Linmsa, 19. p. 729, which is only briefly characterized, and is said 

 to have decurrent leaves. Our plant has the aspect of a Gymnolomia, or of a mo- 

 uoccphalous Zexmenia, from which the pappus distinguishes it. 



ADENornYLLUM Wrigiitii (sp. uov.) : gracile, scabridiim ; foliis pinnatipartitis, 

 segmentis 5- 11 filiformibus inoequalibus muticis ; involucro turbinato 8- 12-den- 

 tato haud setigero basi parce subulato-bracteato ; floribus flavis ; ligulis brevissimis 

 apice bifidis ; pappo utroque 10-paleaceo, paleis exterioribus brevibus oblongis, in- 

 terioribus aristato-trifidis, arista media achenio pubescente ajquilonga. — Hill-sides 

 near the copper mines, New Mexico ; Oct. (P^O.) — Herb a span to a foot high, 

 from an annual root, erect, paniculate-branched, with the aspect of a Dysodia. 

 Leaves with sparse lobes which are not broader than the rhachis, beset with a few 

 large dark glands ; the lowcr opposite, tlie upper alternate. Peduncles 1-2 inches 

 long, furnished with a few subulate bracts ; and with 4 or 5 similar ones surround- 

 ing the base of the involucre, none of them bristle-bearing. Livolucre 3 or 4 lines 

 long, sraaller than in Dysodia chrysanthemoides, composed of 8 or the terminal of 

 10 to 12 lanceolate-oblong glanduliferous scales, which are concreted for three 

 fourths of their length ; their membranaceous tips rather obtuse, not awned nor 

 bristle-bearing. Receptacle small, conical, alveolate and fimbrillate. Rays rather 

 shortcr than the pappus ; the oval ligule shorter than its tube. Lobes of the disk- 

 corolla siibulate. Achcnia silky-pubescent, or when old glabrate, pentargular. 

 Outer pappus of 10 very short and truncate corneous palfae, in a single series; the 





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