V. 



PLAKTJ2 WRIGHTIANJE. 



103 



H 



The leaves are more compoundly dissected than in that species, which shows traccs 



of similar hispid h 



But this is more decidedly distinguished by its ovate 



d 



G 



outer involucral scales, with scarcely any margin (those of E. parthenifo 

 ounded and with broad hyaline margins), and by the marginlcss arhcnia 



The achenia of E. parthenifolia I do not find so much flattencd 



thickened margins, as it is delineated in Delesserfs fig 

 in Cohahuila. 



Dr. Gregg collccted 



311. Melampodium cinereum, DC / Prodr. 5. p. 518; Gra^, Pl. Fefull p, 78, 



Pl. Lindh. 2. p. 225. M. leucanthum, Torr. 8r Gray, Fl. 2. p. 271. llills, 

 near Austin, Texas ; May. 



311% M. ciNEREUM, var. ramosissimum, caulibus gracillimis; foliis linearibus, 

 aliis integerrimis, aliis sinuato-dentatis vel subpinnatifidis ; capitulis minoribus. 

 M. ramosissimum, DC. ! l. c. ; Torr. 8; Grag^ l. c. Prairies from Austin to the 

 Limpia. Also New Mexico, Wislizcnus, &c. A summer state of the species. 



312. SiLPHiuM laciniatum, Linn. ; Torr. 8f Gray, FL 2. p. 275. Prairies near 



San Marcos, Texas.* 



313. Berlandier^ 



of the Limpia; Aug 



scarcely at all canes* 



ti 



lATA, Bentk Pl. Hartw. ; Grai/, Pl. Fendl p. 78. Valley 

 Rays marked with purple veins underneath." A green 



The 



form occurs in the collection of 



1851, mostly with more pinnatifid leaves, passing 



314. B. 



foliis plerisque subbipinnatifidis 



Hills along 



tributary of the Pecos ; Aug 



31 



Parthen 



H.B.K. ! Nov. Gen. §• Sp. 4. p. 260. t. 391 ; BC. 



Prodr. 5.». 532 



P. ramosissimum, DC. ! l. c. Declivities on the San Ped 



Riv 



iind in prairies between the Pecos and the Limpia ; A 



Dry valley betw 



Mapimi and Guajaquilla, and 



Par 



Also at Cerros Bravos (No. 490) 



Northern Mexico, Gregg. 

 with variously sinuate-pinn 

 more or less herbaceous. 

 ramosissimum was founded 



Our plant is decidedly shrubby, two or three feet high 



lobed canescent leaves ; the flowering branches 



It 



the same as 



No. 1342, on which P 



But I find no essential difl^erence between it and 



No. 632, from mountains near the city of Mexico, which 



the samc as 



Humboldt^s plant, and which I suspect is not an annual, but is more or less woody 

 at the base. The flowers, achenia, and pappus are the same in both : the achenia, at 

 least in Berlandier^s No. 632, are not broadly margined, as represented in Kunth's 

 figure, but the slender marginal nerves separate from below upwards, as in the oth- 



species 



The aw^ns of the pappus are subulate 



spreading,'at length divergent or even recurved 



316. P. Hyster 



Linn.: DC. l c, var. h 



fol 



lyrato- 



pinnatifidis 



subbipinnatifidi 



gmentis brevibus obtusissimis 



On the Rio 



Grande. Texas and New Mexi 



N 



Parras and Buena Vista (No. 86), Gregg 



if a vrr^ninrlv-ablfi one. The rool 



Only a variety of P. Hysterophorus, I believe, but a remarkable one. 

 that of an annual ; but the stems are occasionally lignesccnt towards the base 



SUphium doronlcifollun., Kun.e, Ind. Sem. Hort. Lips. 1846, is only S. tcrebinthlnaceum. 



