150 PENTANDRIA. MONOGYNIA. 



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

 serrate, .^i-adualij attenuated down the petiole; segments 

 of the calix acute; petals all beardless; stigma recurved, 

 distinctly rostrate, capitulum roundish almost without 

 margin. Flowers inodorous. 



§11. Prodiiciv^- stems. 



11. canadensis. Style short, compres.sed, stjg-ma capi- 

 tate, without rostrum, on either side somewhat pubescent. 



12. striata. Nerves of the leaves somewhat pubescent 

 on the under side, calix ciliate, t^.ectary rather large, 2 late- 

 xal petals densely bearded; stigma tubular, recurved, a 

 little pubescent on the summit. Flower yellowish white. 



lo. debilis. V^wvsh. T. ca?/?';2ff, Walter. Stem decumbent, 

 leaves renlform-cordate, sei-rulate 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 papilla; 

 on the summit. Nearly allied to the preceding. 



14. rosfraia. Nectarium longer than the corolla, petals 

 all beardless; stigma smooth, erect, attenuately clavute, 

 v/ithout rostrum. Leaves smooth on the under side. 

 Flowers })ale blue, externally purplish. 



15. pubescens. V. periSviva?i?ca. Mich. Leaves either 

 very pubescent, or nearly smooth, subserrate; stipules 

 ovate, mostly entire; style compressed, stigma roundish, 

 almost spherical, v/ith 2 lateral tufts of pubescence, and 

 without rostrum. Fruit smooth. /3. eriocarpon. Fruit 

 densely villous; stipules smaller. In fruit this would be 

 taken for a distinct species, as the character is constant; 

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

 pubescens; both these varieties are abundant near Phila- 

 delphia. 



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

 lobes subserrate; sti))ules ovate, entire oi- serrulate; pe- 

 duncle rather long and slender; flowers yellow; stigma the 

 same as in V. pubescens, to which it appears very closely 

 allied. 



17. hastata. 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 purphsh, the 2 lateral ones bearded; 

 stigma as in V. pubescens^ to which this species also is 

 not inconsiderably related; this plant is however always 

 smooth with elongaTetl Icavssj often marked with disco > 

 loured pale blotches. 



