128 



PLANT^ WRIGHTIAN^ 



y. 



chartaceo-memb 



the cauline, tliree to five inches long, and two or more > 



breadth, reticulated : the lowest, rather obovate and with a narrowed base ; the 



principal cauline, either truncate, or usually 



gittate-cordate at the 



closely sessile base; those of the flowering branches snialler and not auriculate. 

 Heads numerous, in an ample compound corymb, on short pedicels ; the peduncles 

 and pedicels glandular-puberulent, subtended by small subulate bracts, five or 

 six lines long, 8-11- (usually 10-) flowered. Involucre small, not longer than the 

 mature achenia, of 12 to 15 scales; the exterior ones oblong-ovate, the innermost 

 oblong-linear, greenish, not scarious. Corolla pale purple. Achenia 5-ribbed, 



linear-fusiform, attenuate at the summit and terminated by a somewhat enlarged 



disk, as in the whole genus. Pappus of rather copious soft and white capillary 

 bristles, which are similar and nearly equal, scabrous, not at all thickened at the 

 apex. — This spccies is well distinguished by its membranaceous leaves and small 

 heads. 



412. P. Wrightii, var. subpuberula; foliis rigidiusculis minute glanduloso-sca- 

 brellis. — Hills between the Pecos and the Limpia ; Aug. — " CoroUa light purple." 

 This is plainly only a variety of the last, from a dry and exposed locality. It is 

 more allied jto Perezia (Acourtia, DC.) microcephala than to any other species ; 



r 



bnt that species has the scales of the involucre slender and attenuate-acuminate, as 

 in P. hebeclada. 



413. Trixis ANGUSTIF0LIA5 DC. Prodr. 7. p. 69. Hills near the Limpia; Aug. 

 Dr. Gregg has it from near San Luis Potosi, where it was originally coUected by 

 Berlandier. — I should refer this to T. corymbosa, Don, except that the leaves are 

 not petioled. — Berlandier found T. frutescens in Southern Texas, as well as in 

 Mexico. 



414 Leria nutans, DC. Prodr. 7. p. 42; Gray^ PL Lindh. 2. p. 232. Hills 

 near Austin, Texas, and on the San Pedro River. Also on the Rio Grande, 

 Texas. 



415. Stephano^ierta MmoR, Nutt ; Torr. %- Gray^ Fl. % p. 472. Valley of the 



Pecos and of the Limpia ; Aug. — This is the genus Jamesia, Nees in Neu- Wied^ 



Peise (not of Torr. §• Grai/) ; his Jamesia pauciflora being Stephanomeria runci- 

 nata, Nutt 



foliis radicalibus runcinato-pinnatifidis glabratis ; involucro 12-floro 3-4-seriali, squamis lineari-oblongis, 

 exterlorlbus gradatlm breviorlbus ovalibus ; pappo tenui. — Guatemala, Skinner (herb. Hook.). Scape 

 about a foot high, Heads five or six lines in lenglh, on subulate-bracteate peduncles. Pappus fuscous, 

 unlserial, rather fine and soft. 



fid 



•Notwith- 



standlng its five-flovvered heads It would appear to be, as Lessing suggests, a congener of Acourtia for- 

 mosa, Don. The only five-flowered species I have seen is 



P- (Ud-merilia) reticulata, the Proustia reticulata, Lag.^ Don in Trans. Linn. Soc; DC. ! Prodr,!, 

 p. 27. Mexico, Mendez (in herb. DC). Oaxaca, Galeolli, No. 2097. — The leaves are all narrowed at 

 the base, not at all clasping ; the branchlets are puberulent ; the inflorescence is thyrsoid ; the flowers 

 are " light yellow"; the scales of the involucre all oblong and very obtuse. The bristles of the copious 



pappus are somewhat thickened at tlie apex. The heads are sometimcs only four-floweretj, sometimes 

 six-flowcred I 



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V 



