OP ARTS AND SCIENCES. 295 



Abutilastrum is a name quite appropriate for another section, 

 namely for Sida Lindeniana, which would be essentially an Abatilon 

 of the section Gayoides except for the uniovulate carpels. 



BASTARDIA, HBK. The wide-spread B. viscosa, HBK., seems 

 not to be recorded from the eastern parts of Mexico. It is no. 748 

 and 2168 of Berlandier's collection, made between Tula and Tampico. 

 There is also the following apparently very distinct and undescribed 

 species. 



Bastardia Berlandieri. Ut videtur elata et basi frutescens, 

 patenti-ramosa, pube minuta subcinerea, secus ramulos glandulosa ; 

 foliis lato-cordatis cum acumine obtuso sinu saepius clauso (cauliuis 4-5- 

 pollicaribus) ; pedunculis flore brevioribus ; calycis lobis ovatis subito 



* * Stem erect : leaves rather long-petioled and nearly all cordate or subcordate ; 



flowers not long-peduncled : carpels 10-12, bi-mucronate or 2-awned. 



S. coRDiFOLiA, L. Reaches the Florida Keys. 



S. TRAGi^FOLiA, Gray, PI. Lindh. ii. 164. Raised from Wright's seeds sup- 

 posed to have been gathered in Texas, but probably in S. Arizona, as we now 

 have a form apparently of this species ; but leaves less cordate, smaller, and more 

 cinereous, from Arizona, collected by Pringle and by Lemmon ; and Palmer 

 brought from Coahuila specimens connecting these with the type. 



* * * Stems erect and branching: leaves slender-petioled and truncate-obtuse 



or retuse at base, from ovate-oblong to linear : a small tubercle under the 

 base of the petiole (but this occasionally obsolete) : flowers small and nearly 

 all short-peduncled : carpels mostly 5. Species probably not indigenous, 

 even on our southern borders. 



S. spiNOSA, L., with comparatively broad and green leaves. 

 S. ANGusTiroLiA, Lam., with linear or at least narrow and canescent leaves, 

 is doubtfully distinct. It is Engelmann's S. heterocarpa. 



* * * * Stems erect: leaves mainly short-petioled or subsessile, acute or obtuse 



at base but never cordate, usually destitute of tubercle under the petiole, but 

 this sometimes apparent in S. rhomblfolia : carpels 8 to 12. 



•<- Leaves cuneate-obovate or oblong-obovate to lanceolate, green, at most cine- 

 reous puberulent: stems branching, leafy to the top: annuals in the U. S., 

 probably incomers from Tropical America. 



S. RHOMBiFOLiA, L., with var. Canariensis, Griseb. The genuine plant known 

 by the single subulate awn to the carpels. 



S. cARPiNiFOLiA, L. An equally variable species ; includes S. acuta, Burm., 

 S. stipulata, Cav., S. glabra, Nutt., &c. 



-t- H- Leaves mainly linear or linear-lanceolate and obtuse at both ends : carpels 

 bicuspidate or bimucronate just behind an inflexed short apex, or muticous: 

 indigenous perennials. 



S. Elliottii, Torr. & Gray, is a completely glabrous species; with some pe- 

 duncles or pedicels little shorter than the subtending leaf, but many shorter than 



