CATALOGUE. 417 



branched ; branches divaricate, somewhat spinescent ; leaves linear, about 

 4" long, sessile, often subfalcate, obtuse or the younger mucronate ; peduncles 

 mostly solitary, often twice bibracteolate ; flower-bud gibbous, J' long ; sepals 

 purple, moderately unequal, ovate and oblong ; posterior petals equal in 

 length, with united claws, the lateral lamina dilated, oblique, rhomboid-ovate, 

 the middle one much larger, narrowly oblong ; stamens distinct, adnate to the 

 claws ; fruit ovoid, acuminate, sometimes subcordate, canescently hairy and 

 beset with slender barbed prickles.— Southern California to Southern Texas 

 and New Mexico ; Southern Nevada, (Frdmont.) 



Page 38. Ceeastium aevense, L., and Stellaeia ceassifolia, Ehrh. 

 Labrador, (Rev. S. R. Butler.) 



Page 40. Aeenaeia Fendleei, Gray. The typical form of this species 

 was collected in Southern Utah by Dr. Palmer. His very fine specimens 

 are 1° in height, with a decidedly woody base. 



Page 41. Aeenaeia veena, L. Labrador, (Butler.) 



Page 48. Sph^eealcea incana, Torn Plant. Wright. 1. 21. Hoary- 

 velvety throughout with a minute closely appressed stellate pubescence ; 

 stems erect, woody at base ; leaves ovate, sub-3-lobed, obtuse, obsoletely 

 crenulate, sometimes subcordate ; flowers small, axillary, crowded and race- 

 mose-panicled ; cells 2-3-ovuled. Var. oblongifolia. Gray. Tall and 

 slender, 2-3° high, loosely branching; leaves lance-oblong, the lower cauline 

 2-3' long, more broadly lanceolate and often hastately 3-lobed, the upper 

 usually only crenate-toothed, sometimes all more or less lobed; carpels 

 beaked. — The specimens resemble the original 1329 Wright, (thus doubtfully 

 referred by Dr. Gray and noted as "inclined to run into 8. angustifolia, 

 Spach.,") and others collected by Newberry in Ives' expedition ; 58 and 886 

 Wright, considered a variety of 8. angustifolia are but slightly different, and 

 S. Fendleri, Gray, is but another form. New Mexico and Arizona ; Southern 

 Utah, (Palmer.) 



Page 49 — before Geeaniacejs, 



ZYGOPHYLLACE^. 



Laeeea^ Mexicana, Moric. 3-10° high, the branchlets short and very 

 numerous ; leaflets a single pair, connate at base, 2-4" long, elliptic, oblong, 



1 LAEEEA, Cav. Sepals 5, deciduous, imljricated. Petals 5, unguiculate, exceeding tlie calyx, 

 deciduous, imbricated. Disk small, 10-lobed. Stamens 10, inserted at the base of tbe disk ; filaments 

 attached below upon the outer side to a biiid scale ; anthers oblong. Ovary short-stipitate, pilose, 

 53 



