OP ARTS AND SCIENCES : JUNE 11, 1867. 333 



if not wanting, are deciduous from the column in some flowers of S. 

 vitifolia, as in some cultivated specimens of S. malvcejlora. 



Malvastrum rotundifolium : annuum, hispidum ; caule erecto ; 

 foliis subreniformi-rotundatis grossius crenatis indivisis ; pedunculis 

 gracilibus folia pleruinque superantibus ; bracteolis angustissime line- 

 aribus calycis segmentis sensim acuminatis paullo brevioribus ; petalis 

 roseo-purpureis basi macula rubra ; carpellis ultra 40 orbiculatis muti- 

 cis reticulatis. — Sand hills at Fort Mohave (along with M. exile, 

 Gray), Dr. J. G. Cooper. — In aspect not unlike some South Amer- 

 ican species, but more after the fashion of a Sidalcea than any of our 

 species. The stigmas, however, are capitate, and the filaments not clus- 

 tered. Plant rather sparsely, or the calyx more densely, hispid with 

 simple or fascicled bristly spreading hairs. Leaves somewhat resem- 

 bling those of Malva rotundifolia. Stem " two feet," or in depauperate 

 specimens barely a span high. Calyx deeply 5-cleft. Corolla 1£ 

 inches broad, apparently showy. 



Linum spergulinum : annuum, fere glaberrimum ; caule tenui 

 (subpedali) superne effuse paniculato ; pedicellis omnibus filiformibus 

 flore multo longioribus mox patentissimis ; foliis sparsis filiformibus ; 

 glandulis stipularibus nullis ; sepalis ovalibus obtusis margine minutim 

 glandulosis ; petalis roseis albisve, ungue ima basi utrinque unidentato 

 intus appendice linguasformi aucto ; sinubus inter stamina obsolete 

 crenulato-bidentatis ; antheris oblongis ; stylis 3; stigmatibus parvis. — 

 Hills at Cloverdale, Sonoma Co., June, Bolander. Glabrous throughout, 

 except a minute and sparse pubescence on some of the branchlets and 

 pedicels, 6-12 inches high; the flowering branches more paniculate 

 and much more effuse than those of L. Californicum, and with flowers 

 only about half the size, all on almost setaceous, naked, and at length 

 mostly declined pedicels of 4-6 lines in length. Sepals barely 1£ lines 

 long. Petals 2 lines long, obovate, with a narrow claw, its ovate or 

 oblong appendage adnate to its front, more conspicuous than that of 

 L. Californicum. This and the following are interesting additions to 

 the section Hesperolinon which was indicated in a former paper 

 (6, p. 521) upon three Californian species; but these accessions re- 

 quire some modification of subsidiary characters ; — this one, for in- 

 stance, in the length of the pedicels and the very diffuse inflorescence. 



Linum micrantiium : annuum ; caule gracili superne aperte pa- 

 niculato ; ramis cum pedicellis calyce stepius longioribus quandoque 

 puberulis ; foliis alternis angusto-linearibus ; glandulis stipularibus 



