150 rENTANBSIA. MONOGYNIA. 



10. lanceolatn. Leaves perfectly smooth, acute and sub- 

 serrate, .gradually attenuated down the petiole; seg^menis 

 of the calix acute; petals all beardless; stig'ma recurved, 

 distinctly rostrate, capitukim roundish almost without 

 margin. Flowers inodorous. 



§ II. Prodiicmg stems. 



11. ca7iacknsis. Style short, compressed, stigma capi- 

 tate, without rostrum, on either side somewhat pubescent. 



12. striata. Nerves of the leaves somewhat pubescent 

 on the under side, calix ciliate, nectary rather large, 2 late- 

 Tal. petals densely bearded; stigma tubular, recurved, a 

 little pubescent on the summit. Flower yellowisii white. 



13. (/efo7/5. Pursh. T. ca?/ma, Walter. Stem decumbent, 

 leaves reniform-cordate, serrulate or crenate, smooth on 

 the under side, base cucuUate; petiole short; stipules 

 ovate- lanceolate, serrate-ciliate, peduncles very long; seg- 

 ments of the calix linear-lanceolate, acute, smooth; petals 

 oblong, pale blue, the 2 lateral ones bearded; stigma 

 small, tubular, recurved, rostrate, with scabrous papilltc 

 on the summit. Nearly allied to the preceding. 



14. rostrata. Nectarium longer than the corolla, petals 

 all beardless; stigma smooth, erect, attenuately clavate, 

 ■without rostrum. Leaves smooth on the under side. 

 I'lowers pale blue, externally purplish. 



15. pubesccns. V. pensylvanica. Mich. Leaves either 

 very pubescent, or nearly smooth, subserrate; stipules 

 ovate, mostly entire; style compressed, stigma roundish, 

 stlmost spherical, with 2 lateral tufts of pubescence, and 

 without rostrum. Fruit smooth. ,8. eriocarpoji. Fruit 

 densely villous; stipules smaller. ]n fruit this would be 

 (aken for a distinct species, as the character is constant; 

 in any other respect it does not materially differ from V. 

 pubesceiis; both these varieties are abundant near Phila- 

 idelphia. 



16. tripartita. Elliott. Leaves 3 to 5-lobed, pubescent, 

 lobes subserrate; stipules ovate, entire or serrulate; pe- 

 duncle rather long and slender; flowers yellow; stigma the 

 same as in V- pubesceiiSy to which it appears very closely 

 allied. 



17. hastafa. Leaves commonly cordate-ovate, acute, 

 rarely hastate, (or a distinct variety) margin subserrate; 

 petiole very short, peduncle 2 to 3 inches long; petals 

 yellow, externally purplish, the 2 lateral ones bearded; 

 stigma as in V. pubesce7iSy to which this species also is 

 not inconsiderably related; this plant is however always 

 smooth with elongated Icaves* often marked with disco- 

 loiu'ed p<de bjlflichcs> 



