Systematik und Pflanzengeographie 115 



Glabrous, rigid, leaflets 4 — 6 pairs. 



13. L. marithnus (L.) Bigel. • 

 Pubescent; leaflets 5 — 7 pairs. 14. L. vestitus Nutt. 



Stipules small or ininute? not half as large as adjacent leaflet. 



Flowers white. 15. L. lactiflorus Greene. 



Flowers purple, 2,5—3,5 cm long. 

 Stipules entire. 28. L. decaphyllus Pursh. 



Stipules incised or laciniate. 



Flowers 3 — 3,5 cm long. 16. L. splendens Kell. 



Flowers 2,5—3 cm long. 11. L. Alefeldi White. 



Flowers purple, lese than 2 cm long. 



Calyx-tuth nearly as long as the tube. 



17. L. violaceua Greene. 

 Calyx-tuth shorter than the tube. 

 Leaflets coriaceous. 



Leaflets linear-lanceolate. 18. L. coriaceus White. 



Leaflets ovate, oval or oblong. 



19. L. paTvifolius S. Wats. 



Leaflets membranaceous. 



Leaflets 5 — 7 pairs, bioad. 20. L. venosus Muhl. 



Leaflets 2 — 4 pairs. 



Leaflets oblong or linear, 2 — 4 cm long. 



Peduncle eqaalling or shorter than its leaf. 



7. L. myrtifolius Muhl. 

 Peduncle much exceeding its leaf. 



21. L. longipes White. 

 Leaflets narrowly linear, 4 — 12 cm long. 



22. L. graminifolius (S. Wats.) White. 

 Erector nearly so : tendrils O or much reduced. 

 Flowers 2 or more, white or yellowish. 



Flowers about 1 cm long; leaflets mostly 2 pairs (rarely 3). 



23. L. Arizonicus Britton. 



Flowers 2 cm or more long. 



Leaflets narrowly lanceolate, much longer than wides. 



24. L. Cusickii S. Wats. 

 Leaflets oblong; lanceolate or obovate, 2 — 4 times as 



long as wide. 

 Leaflets oblong or obovate ; stipules minute. 



25. L. obovatus (Torr.) White. 

 Leaflets oblong-lanceolate ; stipules nearly as large. 



26. L. rigidus White. 



Flowers 2 or more, purple. 

 Leaflets 3- -7 pairs. 



Flowers 1,5 — 3 cm long. 

 Leaflets coriaceous. 



Leaflets 1 — 4 mm wide. 27. L. ornatu» Nutt. 



Leaflets 5 — 10 mm wide. 28. L. decaphyllus Pursh. 



Leaflets membranaceous. 29. L. NuttaUii S. Wats. 



Flowers 1 — 1,5 cm long. 30. L. Oregonensis White. 



Leaflets 1 — 2 pairs. 31. L. bijugatus White. 



Pingle-flowered ; flowers purple; iearlets 4 — 6 pairs. 



32. L. Tovrcy Ä. Gray. 

 Plant densely silky-villous all over. 33. L. titioralis Endl. 



Humphrey (Baltimore, Md.). 



Schnitze, Albert, Die Phanerogamenflora um Altenburg. 

 Theil II. Dicotyledonen. ( Mittheilung aus dem Qsterlande, heraus- 

 gegeben von der Naturforschenden Gesellschaft des Osterlan- 

 des zu Altenburg S. A. 1892. p. 416—419). 



8* 



