208 LEAFLETS. 



0U8 or tortuous and recurved, beset at intervals with densely 

 subcapitate clusters of flowers, one cluster in the axil of each 

 leaf, the leaves often subsessile. Corollas large, white or pinkish 

 or purple. Calyx large, commonly concealed altogether by a 

 very thick and dense coat of tomentnm. Fruits as depressed and 

 low as those of any Malva, the carpels not very tomentose, their 

 sides without reticulation, one-seeded, promptly dehiscent, the 

 two perfectly distinct valves falling away separately together with 

 the ripe seed. 



The genus thus defined has a number of described species, and 

 perhaps an equal number undescribed. I denominate it Mala- 

 OOTHAMNUS, and with the species I shall here do little beyond 

 indicating the most typical, or in other words fixing the type of 

 the genus. 



M. AKCUATUS. Greene, Man., under Malveopsis. 

 M. Pkemontii. Torr., " Malvastrum. 



M. ORBicuLATUS. Greene, Fl. Fr., '■ " 



M. Datidsonii. Eobinson, " " 



M. Palmeei. Watson, " " 



M. ABORiGiKUM. Eobiuson, " " 



M. DBKSiFLORUS. Watson, " " 



M. MARRUBIOIDES. Dur. & Hilg., " " 



M. FASCICTJLATUS. Nutt. in T. & G., " Malva. 



The second is a small group of desert annuals, the habital and 

 floral peculiarities of which are given in Gray's Synoptical Floral 

 under an asterisk and as heading the whole line of Malvastra, 

 the subsectional adjective employed being Pedunculosa. I assign 

 this series the generic name Eremalche. 



E. ROTUITDIFOLIA. Gray, under Malvastrum. 

 E. Parrti. Greene, " " 



E. BXiLis. Gray, " " 



From my way of viewing things, the genus Sida, as set forth 

 by Bentham and adopted by Gray, is less mixed by diversity of 

 types than is Malvastrum; yet here also, the section defined by 

 Gray and named by him Pseudo-Malvastrum, is to my mind 



