233 LEGUMINOSiE. (PULSB FAMILY.) 



1 1 Calyx-tule lO-nerved; throat m fruit open, hairy, or closed, callous. 

 X Leaves all alternate. Heads terminal, peduncled. 

 6 T. arvense, 7 stellatum, 8 velivolum, 9 augustifolium, 10 pur- 

 pureum, 11 Paloestiuuin. 



\ I Upper leaves ojyposite, f miming an invohicre. Heads terminal, pe- 

 duncled. Throat of calyx closed. 

 12 T. dichroanthum, 13 formosum, 14 Haussknechtii, 15 Candol- 

 lei, 16 Latinum, 17 supinum, 18 Carmeli, 19 Alexandrinum, 20 Panor- 

 mitanum, 21 maritimum, 22 plebeium, 23 Alsadami, 24 scutatum, 

 35 clypeatum. 



X\X Upp^r leaves opposite or alternate. Heads sessile, axillary or 



terminal. Flowers minute. Calyx throat closed. 

 26 T. scabrum, 27 compactum. 



Sect. II. Trichocephalum, Koch. Throat of calyx naked, tube 

 not inflated. Heads axillary. Flowers bractless, a few of the outer 

 ones fertile, coroUate, the inner sterile, destitute of corolla, growing 

 medusa-like by the development of the calyx-teeth at maturity. 

 * Sterile flowers ap)pearing only as a central 7iodule lef ore flowering. Galyx- 

 teeth not plumose. 



38 T. subterraneum. 



* * Sterile flowers formed before flowering. Calyx-teeth plumose. 



29 T. globosum, 30 pilulare. 



Sect. III. Galearia, Presl. Throat of calyx naked, 2-lipped. 

 Fruiting tube inflated, netted-veined. Heads axillary ; flowers bfac- 

 teolate ; pod included in calyx-tube. 



* Perennials. Fruiting calyx globular, helmet-sJiaped. 



31 T. fragiferum, 33 physodes, 33 Germanicise. 



* * Annuals, Fruiting calyx globular, villous or woolly. 



34 T. resupinatum, 35 tomentosum, 36 buUatum. 



Sect. IV. Vesicastrum, Koch. Throat of calyx naked, tube after 

 flowering more or less inflated, lobes equal. Heads terminal ; flowers 

 bracteolate ; pod inflated, long beaked. 



37. T. spumosum, 38 Aintabense, 39 xerocephalum. 



Sect. V. Paramesus, Presl. Throat of calyx naked, tube in fruit 

 not inflated. Heads axillary and terminal ; flowers minute, bracteolate, 

 petals connate, marcescent ; pod leathery, somewhat exserted. 



40 T. glanduliferum, 41 nervulosum. 



Sect. VI. Trifoliastrum, Ser. Throat of calyx naked, 10-nerved. 

 Heads axillary, rarely terminal ; flowers bracteolate, generally pedicel- 

 led ; petals persistent, at length scarious ; pod membranous. 



* Annuals. 



t Heads sessile. Pedicels very short. 



42 T. glomeratum. 



1 1 Heads long peduncled. Pedicels long, refUxed in fruit, 



