LEGUMINIFER^. 87 



teeth : fruiting calyces rcfloxcd, with a memhranoiis ovoid tuhe 

 and curved teeth ; harren calyces produced above the fertile flowers, 

 after the corolla has fallen, at first appearing like a tuft of white 

 fleshy tapering fibres, which press back the fertile calyces against 

 the peduncle — afterwards, 5 points or teeth shoot out from the apex 

 of the tleshy fibres, representing the calyx-teeth. Petals very long 

 and narrow, cohering so as to form a tube ; standard very slightly 

 spreading, streaked with purple lines ; wings shorter than the 

 standard, but longer than the keel. Pods globular, compressed, 

 Avith a single dark brown shining seed. Plant pale bright-green, 

 very hairy. 



This plant is remarkable for the pods being generally matured 

 beneath the ground. At first both the peduncles and flowers are 

 erect, i.e. parallel to the prostrate stems ; but after flowering, the 

 peduncle bends at the extremity, so that its apex is directed ver- 

 tically downwards. At this time the growth of the barren calyces 

 presses back the sjireading fertile ones, until these are so much 

 reflexed as to be parallel to the peduncle in a direction contrary to 

 their original one, with their mouths directed away from its apex, 

 and consequently towards the sky : preserving tiiis direction, they 

 bury themselves in the earth, and become rooted beneath the surface 

 by the filaments issuing from the apex of the head, while the reflexed 

 barren calyces protect the pods in their passage downwards. 



Subterranean Trefoil. 



French, Trejle Souterrain. 



Section II.— LAGOPUS. Koch. 



Heads of flowers sub-globose, oblong, or cylindrical. Flowers 

 numerous, sessile or sub-sessile. Pedicels M'ithout bracts at the 

 base. Calyx not becoming vesicular in fruit, with a more or less 

 conspicuous callous ring in the throat, or a circle of hairs ; calyx- 

 teeth generally ciliated, equal, or the lower one largest. Corolla 

 purple, rose, white, or ochreous, persistent, marcescent, usually 

 shrivelling. Pod sessile within the calyx, 1-secded. 



SPECIES II.— TRIP O LIU M PRATENSE. Linn. 

 Plate CCCXLVII. 



Rootstock branched, producing tufts of leaves, and straight, 

 erect or somewhat decumbent, slightly branched or simple stems. 

 Leaves distant, with oval or elliptical leaflets, only those of the lower 

 leaves notched at the apex, finely denticulate on the margins, or 

 nearly entire. Stipules membranous, with numerous nerves which 

 anastomose near the margin, adnate for two-thirds their length, with 



