190 THE FLORA. 



1 P. peren''nis. Peren7iialWild-hecin. Leaflets ovate, pointed. Eacemes in pairs. 4-7 f.jo. 



2 P. diversifo''lius. Trailing W. Leaflets angular, 2-3-lobed. Peduncle longer 



than leaf. c. 



3 P. hel'volus. Long-stalked W. Leaflets lance-ovate, not lobed. Peduncle 3-4 



times longer tlian the leaf. M. S. 



4 P. pauciflo'rus. Faw-jUnvered W. Leaflets linear-oblong, hairy. Peduncle longer 



than the leaf. W. 



5 P. vTilga'ris. Common, Garden-bean. Leaflets ovate, pointed. Racemes solitary, 



shorter than leaves. 



6 P. multiflo^rus. Scarlet Pole-hean. Fls. scr.rlet, showy. Eoot tuberous. Pedicels opp. f 



7 P. luna^tus. Lima B. Flovi-ers white. Lfts. ovate-deltoid, acute. Pods broad, large. 



8 P. na'nus. Bush-lean. Erect, bushy. Leaves broad-ovate, acute, t 



2. A'PIOS. Ground-nut. 



Calyx bell-shaped, somewhat 2-lippetI, the 2 side teeth nearly obsolete, 

 the lower tooth longest. Keel incurved and at length coiled against the 

 very broad, reflexed banner. Ovary sheathed at base. — Twining, smooth 

 herbs. 2f Root bearing eatable tubers. Leaves pinnately 5-7-foliate. 



A. tubero'sa. Stem round, twining about other plants, 2-4f. in length. Leaflets 

 mostly 7, narrow-ovate, more or less acuminate, on short stalks. Eaeeines 

 axillary, solitary, dense-flowered, shorter than the leaves. Flowers dark pur- 

 ple. The tubers on the root are oval, thick, and very nutritious. In thickets 

 and shady woods. July., Aug. 



3. ROBIN'IA. Locust. 



Calyx short, bell-shaped, 5-cleft, the 2 upper divisions more or less 

 united. Banner large, wings obtuse. Stamens diadelphous (9 & 1). 

 Style bearded inside. Legume flattened, long, many-seeded. — Trees and 

 shrubs with stipular spines. Leaves unequally pinnate. Flowers showy, 

 in axiUary racemes. April., May. 



R. visco'sa. Clammy Locust-tree. Eacemes rather compact, rose-white, erect. 



Branchlets and stalks sticky. Leaflets ovate. In parks. Native South. 

 R Pseudaca'cia. Common Locust-tree. Eacemes rather loose, drooping, white, 



fragrant. Leaflets oblong-ovate, smooth, as well as the branchlets. 

 R. his'pida. Ease Acacia. Shrub 4-9f. high, hispid, with clusters of large, purple 



flowers. Leaflets 5 or 6 pairs, broadly oval. 



4. MELILO'TUS. Melilot. Sweet Clover. 



Calyx tubular, 5-toothed. Keel petals completely united, shorter than 

 die others. Of the 1 stamens 9 are united one separate. Pod 1 or few- 



