LEGUMINOSZ-PAPILIONACEZ. 207 
thers; the fruit is generally, if not always, one-seeded. The sub- 
series includes nine genera: Psoralea, Dalea, Marina, Petalostemon, 
Lysenhardtia, Amorpha, Paryella, Apoplanesia, and Asagrea. 
IV. LOTUS SERIES. 
Lotus' (Fr., Lotier) has irregular resupinate hermaphrodite flowers. 
On the edges of the concave receptacle, lined with glandular tissue, 
are inserted the perianth and 
androceum. The five equal or 
unequal lobes of the gamo- 
petalous calyx are approxi- 
mated into two lips.? The 
corolla is papilionaceous. Its 
standard, obovate ovate acu- 
minate, or suborbicular, ta- 
pers slightly at the base to 
form a short claw. The wings 
are obovate, very unsymme- 
trical towards the base of the 
shortly unguiculate limb. 
The incurved or inflexed 
beaked keel is gibbous on both 
sides. There are ten diadelphous stamens, the nine inferior being 
united into a tube cleft above, while the tenth or vexillary 
stamen is free. The five alternipetalous stamens are longer than 
the rest, and their filaments are more dilated above, below the 
introrse or subbasifixed two-celled anthers, which dehisce longi- 
tudinally. The gyneceum, inserted in the bottom of the receptacle, 
consists of a sessile multiovulate ovary, surmounted by a glabrous 
style, naked or bearing an appendage of variable form, and with a 
Lotus corniculatus (Bird’s-foot Trefoil). . 
Fie. 168. 
Fruit (2). 
1L., Gen, a. 897.—DC., Prodr., ii. 209.— 
Heineckenia Wxzp, in Exs. Canar. Bourg., ex 
Envt., Gen., n.6514.—B. H., Gen., 490,n. 81.— 
B. H., loc. cit. 
Tetragonolobus Scov., Fl. Carniol., ii, 87.—SER., 
in DC., Prodr,, ii. 215.—ENDL., Glen., n. 6515.— 
Lotea Wrzs, Phyt. Canar., ii. 80.—Anisolotus 
Brrnu., Ind. Sem. Hort. Erfurth. (1837).— 
Pedrosia Lows, in Hook. Journ., viii. 292.— 
2 Well marked in the section Zotea, but the 
calyx-lobes or teeth tend to become distinct and 
more nearly equal in the remaining sections of 
the genus, viz., Krokeria (Srr.), Pedrosia, and 
Anisolotus. 
