VI. 



PLANT^ WEIGHTIAN^. 



? 



\ 



85 



S 



EIL, var. y. Torr. 8r Gray, FL 2. ». 279. Thickets 



the Sabinal, Texas ; July. (1408.) 



Berlandiera lyrata, Benth. PL Hartw. ^j. 17; Gray, PL FendL p. 78. Valley 

 of Live Oak Creek, Western Texas ; May. On Mule Creek, New Mexico ; July. 

 (1203.) 



Melampodium cinereum, DC. ; Gray, PL Fendl L c, ^ PL Wright. p. 103. On 

 the Leona and San Felipe, AVestern Texas ; May : the variety that corresponds to 

 M. ramosissimum, DC! (1204.) Hills near El Paso ; April: the form described 

 as M. leucanthum, Torr. §• Gray, and No. 311 of the collection of 1849. 



M. HisriDUM, H. B. K Nov. Gen. §• Spec. 4. p. 273. t. 399. Yalleys between the 

 San Pedro and Santa Cruz, Sonora ; Sept. (1205.) — A slender state of tbe species. 

 The ligules are extremely short, 2 - 3-toothed. 



Parthenium incanum, H. B. K. l. c. p.. 260. t. 391 ; Gray, PL Wright. p. 103. 

 P. ramosissimum, DC. Prodr. 5. p. 5^2. Prairies at Cook's Spring, between the 

 Eio Grande and tlie Mimbres; July. (1206.) 



L 



EuPHRosYNE ambrosi^folia, Gi'ay, PL Wright. p. 102. Sides of mountains, 

 near Conde's Camp, New Mexico; Aug., (1207.) — " Stems branching widcly." 

 Cauline leaves ovate in circumscription, \ripinnatifid ; the divisions and lobes 



ded. — Cyclachasna xanthiifolia is plainly a congener of this ; and that 



8 



must acco.rdingly be reduced to Euphrosyne, notwithstanding the minute rudiment 

 of a corolla in thc fertile flowers. — The following plant has nearly the habit of 

 Euphrosyne xanthiifolia, with a floral structHre intermediate between tliat genus, 



Iva, and Parthenium 



PAETHENICE, Nov. Gen. 



Capitulum hemisphaericum monoicum ; floribus foemineis 6 - 8 in ambitu, mas- 

 culis 40-50 in disco. Involucrum biseriale; squamis herbaceo-membranaceis, 

 exterioribus 5 ovalibus, interioribus 6-8 paullo majoribus orbiculari-obovatis. 

 Receptaculum convexum, ambittl serie simplici palearum instructum, paleis lineari- 

 navicularibus carnoso-coriaceis per paria ima basi ovariorura fertilium utrimque 

 accretis, in disco paleis minimis setaccis vel obsoletis intcr ovaria abortiva. Co- 

 roUa) radii subtubulosa^, obliquce, intus fissae, extus 2 - 3-dentatae, discum demum 

 suba^quantes, styli ramis lato-linearibus dimidio breviores, deciduae. Flores disci 

 steriles Iva?. Achcnia (radii) obovato-oblonga, obcompressa, glabra, facicbus tuber- 

 culis minimis parcis scabra, vix marginata, vertice incurva apiculata, obliqua, intus 

 dente minimo squamaceo instructa, ab involucri squamis discreta, cum paleis vacuis 

 receptaculi utriraque quasi bracteolata seccdentia. — Herba annua ? orgyalis, pube 

 brevissima molli undique cinerea ; foliis omnibus alternis ovatis, majoribus subcor- 

 datis, acuminatis duplicato-dentatis ; paniculis folio 

 pedicellatis parvulis. 



Parthentce mollis. 



pituli 



Mountain ravine at Santa Cruz, Sonora; Sept. (1208.) 



I have also raiscd this from seeds, in the Cambridge Botanic Gardcn. It is an 

 herb of from 4 to 6 feet high, paniculatcly branched abo^e, with the aromatic odor 

 of an Artemisia, and with mucli the aspcct of Euphrosync xanthiifolia, except that 



pl. wr. — 12. 



