PEA FAMILY 



141 



1. T. eremUicum. 



Pod 6 mm. wide, mottled; corolla about 1.5 cm. long. 5. H. amplexa. 



Plant Wrsute; pod over 4 mm. wide. . 6. H. malaca. 



Legume straight. 



Racemes short, subcapitate; corolla light bluish purple; leaflets oblong to obcor- 



date, green. 7. H. leptocarpa. 



Racemes elongate, lax; corolla cream-colored; leaflets narrowly oblong or Unear, 



grayish strigose. 8. H. atratiformis. 



24. TiUM Medic. 



Stipe exceeding the calyx; pod not incurved. 



Pod not black-hairy; corolla white or ochroleucous. 

 Pod erect, glabrous. 



Stipe much longer than the calyx. 



Stipe scarcely exceeding the calyx. 



Pod with a partial septum. 



Pod glabrous; stipe 3—4 mm. long. 

 Pod strigose; stipe 1 mm. long. 

 Pod without septum. 

 Pod reflexed. 



Plant villoixs; pod cordate in cross-section. 5. T. Drummondii. 



Plant appressed-pubescent or glabrous; pod more or less triangular or inverted 

 V-shaped in cross-section. 

 Pod 2-3 cm. long; corolla 15-20 mm. long. 

 Calyx not black-hairy ; pod straight. 

 Calyx black-hairy; pod arcuate. 

 Pod less than 1.5 cm. long; flowers 6-8 mm. long. 

 Pod black-ha,iry; corolla violet or purple. 

 Stipe shorter than the calyx or almost none; pod incurved. 

 Pod mottled; plant green, very slender. 

 Stem slender, spreading. 



Raceme 1-5-flowered, short; leaflets obovate or orbicular. 



10. r. sparsiflorum. 

 Raceme 5— 10-flowered; leaflets linear. 11. T. owyheense. 



Stems stout, erect; raceme 5-15-flowered. 



Leaflets obovate or orbicular. 12. 



Leaflets narrowly elliptic. 13. 



Pod not mottled; plant cinereous. 



Pod appressed-pubescent. 14. 



Pod huBute-vlllous, with spreading hairs. 15. 



T. atropubescens. 

 T. obscurum. 

 T. arrectum. 



T. racenwsum. 

 T. scopulorum. 

 T. Rusbyi. 



9. r. alpinum. 



T. variegatum. 

 T. naturiiense. 



T. humistratum. 

 T. desperaium. 



25. DIHOLCOS Rydb. 



Pod glabrous; body about 1.5 cm. long; upper calyx-teeth 3-4 mm. 



Ion"; corolla white. 

 1. D. decalvans. 

 Pod strigose; upper calyx-teeth less than 3 mm. long. 



Body of the pod 12-15 mm. long; corolla usually purple. 2. D. bisulcatus. 



Body of the pod rarely 10 mm. long; corolla white or straw-colored, only the keel 

 sometimes tipped with purple. 

 Pod distinctly cross-ribbed. 



Corolla more than 1 cm. long; pod very acute at both ends; stipe 5 mm. long. 



3. D. scobinatulus. 

 Corolla less than 1 cm. long; pod obtusish or abruptly acuminate at both ends; 

 stipe 3 mm. long. 4. D. Haydenianus. 



Pod not cro.ss-ribbed; corolla 6 mm. long. 5. D. micranthus. 



26. JONESIELLA Rydb. 



27. RYDBERGlfiLLA Fedde & Sydow. 



1. J. asclepiadoides. 



1. R. scaphoides. 



Pod with a broad partition, almost 2-celled, except at the apex. 

 Pod with a narrow, sometimes obsolete partial partition. 

 Stipe of the pod 4-8 mm. long. 



Leaflets oblanceolate or oblong. 2. R. arcta. 



Leaflets obovate. 3. R. Preussii. 



Stipe of the pod 1-2 mm. long; leaflets oblong to oval. 



Plant glabrous; leaflets oblong, retuse. 4. R. praelonga. 



Plant nispidulous-strigose on the upper parts of the stem and the lower surface 

 of the leaves. 5. R. Pattersonii. 



28. CTENOPHYLLUM Rydb. 



Leaflets narrow. 



Leaflets flliform or nearly so, 2-4 cm. long, 1-2 mm. wide. 1. C. pecHnatum. 



Leaflets linear, 2-3 cm. long, 3-4 mm. wide. 2. C. Grayi. 



Leaflets oblong to broadly obovate. 3. C adanum. 



29. CNEMIDOPHACOS Rydb. 



Pod with a rudimentary partition. 

 Pod without a partition. 



Calyx densely black-villous. 



Calyx not black-hairy or with a few scattered black hairs. 

 Calyx strigose with rather short hairs. 



1. C reventoides. 



2. C. reventus. 



