VI- PLANTiE -WRIGHTIAN^. 85 



SiLPHiUM SCABERRIMUM, EU., var. y. Toir. 4" Grai/, FL 2. p. 279. Thickets on 

 the Sabmal, Texas ; July. (l-i08.) 



BERLA.NDIERA LYRATA, Bentfi. FL Hartw. j7. 17 ; Grai/, FI. Fernll p. 78. Valley 

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

 (1203.) 



Melasipodium cinereum, DC. ; Gray^ Fl. Fendl I. c, 8)' FL Wright, p. 103. On 

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

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

 as M. leucanthum, Ton: Sr Gray, and No. 311 of the collection of 1849. 



M. HispiDUM, H. B. K. Nov. Gen. Sr Spec. 4:. p. 273. t. 399. Valleys between the 

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

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



Parthenium incanum, H.B.K. I. c. p. 2G0. t. 391; Gray, Fl. Wriyht. p. 103. 

 P. ramosissimum, DC. Frodr. b. p. 532. Prairies at Cook's Spring, between the 

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



Euphrosyxe AMBROSI.EFOLIA, Gray, FI. Wright, p. 102. Sides of mountains, 

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

 Cauline leaves ovate in circumscription, tripinnatifid ; the divisions and lobes 

 crowded. — Cyclachsena xanthiifolia is plainly a congener of this ; and that genus 

 must accordingly be reduced to Euphrosyue, notwithstanding the minute rudiment 

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

 Euphrosyne xanthiifolia, with a floral structure intermediate between that genus, 

 or Iva, and Parthenium. 



PARTHENICE, Nov. Gen. 



Capitulum liemispha;ricum monoicum ; floribus fccmineis 6 - 8 in ambitu, mas- 

 culis 40 — 50 in disco. luvolucrum biseriale; squamis herbaceo-raembranaceis, 

 exterioribus 5 ovalibus, intei'ioribus 6-8 pauUo majoribus orbiculari-obovatis. 

 Eeceptaculum convexum, ambitu serie simplici palearum instructum, paleis lineari- 

 navicularibus carnoso-coriaceis per paria ima basi ovariorum fertilium utrimque 

 accretis, in disco paleis minimis setaceis vel obsoletis inter ovaria abortiva. Co- 

 roUce radii subtubulosaj, obliqufe, intus fissse, extus 2 - 3-dentat8e, discum demum 

 subaequantes, styli ramis lato-linearibus dimidio breviores, deciduse. Elores disci 

 steriles Ivce. Achenia (radii) obovato-oblonga, obcomprcssa, glabra, faciebus tuber- 

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

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

 receptaculi utrimque quasi bracteolata secedentia. — Herba annua ] orgyalis, pube 

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

 datis, acuminatis duplicato-deutatis ; paniculis foHosis laxis ; capitulis longiuscule 

 pedicellatis parvulis. 



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

 — I have also raised this from seeds, in the Cambridge Botanic Garden. It is an 

 herb of from 4 to 6 feet high, paniculately branched above, with the aromatic odor 

 of an Artemisia, and with much the aspect of Euphrosyne xanthiifolia, except that 



PL. WR. — 12. 



