148 FAB ACE AE 



Leaflets elliptic, acute at both ends, cuspidate at the apex. 



13. L. pauciflorus. 

 Leaflets narrowl.v linear. 14. L. lenuior. 



Stipules narrow, less than half as long as the leaflets. 



Leaflets elliptic to oval. 16. L. decaphi/llus. 



Leaflets linear-oblong or oblanceolate. 16. L. brachycalyx. 



Corolla wliite or yellowish. 

 Tendrils well developed. 



Stipules laige and broad, often half as long as the leaflets; corolla about 15 mm. 



long. 17. L. ochroleucus. 



Stipules smaller, much less than half as long as the leaflets; corolla about 20 mm. 

 long. 18. L. laetivircns. 



Tendrils reduced; stipules narrow and small. 

 Corolla about 1.5-20 mm. long. 



Leaflets ovate or oval or obovate. 19. L. obovatus. 



Leaflets linear or lance-Unear. 4. L. ornatus. 



Corolla 10-15 mm. long. 



Leaflets oval. 20. L. leucanlhus. 



Leaflets linear. 21. L. arizonicus. 



44. APIOS Moench. Ground-nut. i. A. Apios. 



45. STROPHOSTYLES EU. Wild Bean. i. 5. paucinora 



Family 66. GERANIACEAE. Geranium Family. 



Carpels rounded, their tails (styles) glabrous witliin, merely recoiling at maturity; leaves 

 in ours palmately veined and lobed. 1. Geranium. 



Carpels spindle-shaped, their tails (styles) pubescent within, spirally coiled at maturity; 

 leaf-blades in ours pinnately veined, pinnately lobed or dissected. 2. Erodium. 



1. GERANIUM (Tourn.) L. Cranebill, Wild Geranium. 



Petals 2-7 mm. long, at most slightly exceeding the calyx; plants annual or biennial, or 

 sometimes perennial in G. Ihcrmalc. 

 Sepals not bristle-tipped; seeds smooth. 



Carpels wrinkled; stamens 10. 1. G. molle. 



Carpels finely pubescent; stamens 5. 2. G. pusillum. 



Sepals awn-tipped; seeds reticulate or pitted. 

 Awn-tips less than 1 mm. long. 



Seeds reticulate; pedicels slightly liirsute, not glandular. 3. G. thermale. 

 Seeds pitted; pedicels glandular-pubescent. 4. G. rotundifolium. 



Awn-tips 1-2 mm. long. 



Beak and branches of the style less than 3 mm. long. 5. G. carolinianum. 

 Beak and branches of the style more than 4 mm. long; inflorescence open. 



6. G. BickncUii. 

 Petals 1-3 cm. long; plants perennial, with rootstocks or caudices; seed reticulate. 

 Petals white; style-column and carpels glandular. 



Leaf-blades tliin, sparingly hirsute beneath; upper petioles retrorsel.v hirsute or 



glabrous; sepals slightly if at all glandular. 7. G. Richardsonii. 



Leaf-blades tliick, strigillose beneath; upper petioles canescent; sepals densely 

 glandular-pubescent. 

 Leaf-blades with long lanceolate lobes ; veins of the petals very strong. 



8. G. nervosum. 

 Leaf-blades with short ovate lobes; veins of the petals rather weak. 



17. G. Cowenii. 

 Petals purple or rose. 



Plants with simple rootstocks or caudices; stem erect and simple below; style- 

 colunm glandular-pubescent. 

 Stem and petioles glandular- viscid ; petals strongly veined. 



9. G. viscosissimum. 

 Stem and petioles retrorsely hairy, not glandular-viscid. 



Petioles of the upper leaves minutely puberulent; petals strongly veined. 



10. G. strigosum. 

 Petioles of the upper leaves with long hairs; petals faintly veined. 



Stem nearly glabrous, sparingly hirsute; leaves short-strigose ; Inflor- 

 escence open. 11. G. incisum. 

 Stem and leaves densely hairy; inflorescence congested. 



12. G. canum. 

 Plants with cespitosely branched caudices; stems usually diffusely branched. 

 Petals obcoi-date to broadly ol)o^•ate, light pm-ple, with darker veins. 

 Stem glandular-villous with long spreading hairs. 



Divisions of the leaves much longer tlian broad, with o\'ate or lanceolate, 



acute teeth. 13. G. Parryi. 



Divisions of the leaves about as broad as long, with broadly ovate, 

 abruptly short-acuminate teeth. 14. G. PaUersonii. 



Stem, petioles, and calyx with short graj-ish pubescence. 

 Pedicels and style-column densely glandular-pubescent. 



Leaves with broadly ovate teetli; petals distinctly emarginate. 



15. G. Fremontii. 

 Leaves with lanceolate or lance-ovate teeth; petals scarcely emar- 

 ginate. 16. G. caespitosum. 



