88 



174. MELILOTUS. 



what tnmcate. 

 Sic. — Guss. 



a. 4, 5. Ifoist meadoics. 



15. infesta. Leg. subglobose, 1-2-seeded, 

 shorter than its stalk. Teetii of Cal. unequal. 

 Wings half as long as standard and keel ! Fl. 

 imbricate. Stip. subulate, laciniato-dentate. 

 Lts. obovate and oblongo-cuneate. a. 4, 5. 

 Fields. Sic. 



16. messanensis. Leg. unequally lan- 

 ceolate, acute at each end. Seed 1, subovoid, 

 compressed, large, black, dotted. Teeth of Cal. 

 nearly equal. Rac. few-flowered. Stip. broad 

 and dentate at base, linear above. Lts. obovato- 

 cuneate. a. 4, 5. Meadoics. w. Sic. Luc. 

 Toulon. 



175. TRIFOLIUM. 



A. Calyx sessile, mthout bracts. Mouth 

 with a hairy or callous ring. 



i. Calyx with 20 neiTCS. 



a. Teeth nearly equal. Sp. 1-6. 



b. Lower Tooth twice as long as others. 

 Sp. 7-9. 



ii. Calyx with 10 nerves. 



a. Heads terminal, on a leafy stem or 

 branch. Sp. 10-14. 



b. Heads terminal, on a nearly naked 

 branch. This division it is not easy to 

 characterize. The heads are partly 

 terminal, and in that case there is a 

 pair of L. not distant from them ; and 

 partly on lateral branches, which are 

 naked except in having such a pair- of 

 L. Where these L. are close to the 

 head, the latter is usually said to be 

 sessile ; where more distant, it is 

 described as stalked. It is the presence 

 of these L. on the axillary flower-stalks 

 which distinguishes this section from 

 the next. In T. stellatmn, however, 

 there is only a single L. near the head, 

 and even this is sometimes wanting ; 

 and in T. striatum it seems that the 

 flower-stalk is sometimes naked. 



* Teeth reticulato-venose. Sp. 15. 



** Teeth unequal, 3 -nerved. Sp. 16-20. 



*** Teeth very unequal, only the 

 largest 3-nerved. Sp. 21-24. 



**** Teeth 1 -nerved, on a somewhat 

 triangular base. 



t Fl. large. Teeth setaceous. Sp. 

 25-29. 



ft Fl. small. Teeth subulate. Sp. 

 30-33. 



c. Heads terminal and axillary, on nated 

 stalks. 



* Heads from a paii- of L. Sp. 34-37. 



** Heads from a single L. Sp. 38^0. 



d. Axillary Heads sessile. Sp. 41-43. 



B. Calyx sessile, without bracts, not inflated ; 

 the mouth open. Sp. 44. 



C. Calyx inflated after flowering ! 



i. Calyx haiiy, 2-lipped ; the upper alone 

 inflated. 



a. Calycesbent down after flowering, fonn - 

 ing an even, globose head. Sp. 45-47. 



b. Calyces spreading after flowering, form- 

 ing a stellate head. Sp. 48, 49. 



ii. Calyx hairless. Teeth nearly equal. 

 Tube inflated. Sp. 50-52. 



D. Calyx not inflated. Striae nimierous. 

 Stalis furnished with bracteoles. Sp. 53. 



IQ. Calyx 10-ribbed (as in all the following). 

 Bracteoles nearly sessile. Sp. 54-56. 



P. n. in heads. Calyx on a slender brac- 

 teolate stalk. Teeth equal, or two upper 

 longest. 



i. Stalks shorter than tube of calyx. Sp. 

 57-60. 



ii. Inner Stalks about equal to tube of calyx. 

 Sp. 61-63. 



iii. Inner Stalks much longer than tube of 

 calyx. Sp. 64-69. 



G. Fl. solitary, or in a lax umbel. Calyx on 

 bracteolate stalks. Fl. large, coriaceous, 

 persistent; purple or white. Sp. 70-73. 



12. Fl. yellow, scored, deflexed. Upper Teeth 

 shorter. 



i. L. pinnato-ternate. Sp. 74-77. 

 ii. All L. ternate. Sp. 78-83. 



A. Calyx sessile, not inflated after flowering , 

 without bracts. Mouth with a callous 

 or hairy ring. 



i. Calyx 20-nerved. 

 a. Teeth nearly equal. 



1. congestuiii. Plant very compact. 

 Teeth of Cal. rigid, subulate, equalling corolla. 

 Tube very villous. Heads subglobose, crowded, 

 bracteate. Stip. acuminate, scariose. Lts. 

 obcordato-cuneiform. a. 4, 5. Clayuncult. Sic. 



2. lappaceum. Difluse. Teeth of Cal. 



