BAPTISIA. XLVI1. LEGUMINOS^E. 235 



31. LUPIN US. Tourn. 

 Lat. lupus, a wolf; because it overruns the field and devours its fertility. (Doubtful.) 



Calyx deeply bilabiate, upper lip 2- cleft, lower entire or 3- toothed; 

 wings united towards the summit ; keel acuminate ; stamens mona- 

 delphous, the filamentous sheath entire ; anthers alternately oblong 

 and globose ; legume coriaceous and torulose. Herbs. Lvs. palmate- 

 ly 5 15-foliate. 



1. L. PERENNIS. Common Lupine. 



Rt. creeping, perennial ; Ifts. 79, oblanceolate, mucronate ; Us. alternate ; 

 col. without appendages, upper lip emarginate, lower entire. TL Grows wild 

 abundantly in sandy woods and hills, Lake Champlainto Wis. Lapham ! S. to Ga. 

 It is a beautiful plant, much cultivated in gardens. It is often called sun-dial, 

 from the circumstance of its leaves turning to face the sun from morning till 

 night. Stem erect, soft, smoothish, a foot high. Leaves soft, downy, on long 

 stalks. Lfts. 1 2' by 4 6"j lanceolate, broadest above the middle. Flowers 

 blue, varying to white, in a terminal spike or raceme. May, June. 



2. L. POLYPHYLLUS. Lindl. Many-leaved Lupine. Tall ; Ifts. 11 15, lanceo- 

 late, sericeous beneath ; fls. alternate, in a very long raceme ; pedicels longer 

 than the lanceolate, deciduous bracts ; cat. ebracteolate, both lips subentire ; leg. 

 densely hairy. Tj. A splendid ornament of the garden, from Oregon. Stem 

 3 5f high. Racemes a foot or more long. Flowers scattered (subverticillate 

 in /?. grandifolius, Lindl,J), white, purple or yellow in different varieties, j- 



3. L. NOOTKATENSIS. : Doim. Nootka Sound Lupine. St. villous, with long, 

 spreading hairs ; Ifts. oblong-lanceolate, mucronate, attenuate at base, sericeous 

 beneath ; cal. very hairy, both lips nearly entire ; bracts linear, hairy, longer 

 than the calyx. A handsome species, from th$ Nv'W. Coast, 2 3f high, in 

 gardens. Leaflets about 7. Flowers purple, f 



4. L. ARBOREUS. Tree Lupine. Fruticose ; fls. in whorls ; cal. appendaged, 

 lips acute, entire. A handsome exotic shrub, 6f high, with large yellow flowers, f 



Obs. Several annual species are occasionally sown in gardens, as L. albus, with white flowers ; L. pi- 

 losus, with rose-colored flowers ; L. luteus, with yellow flowers, and L. hirsutus, with blue flowers, and 

 an appendaged calyx. 



32. LABURNUM. Benth. 



Calyx campanulate, bilabiate; upper lip 2, lower 3-toothed ; vexil- 

 lum ovate, erect, as long as the straight wings ; filaments diadelphous 

 (9 &. 1) ; legume continuous, tapering to the base, several-seeded. Ori- 

 ental thornless shrubs or trees. Lvs. palmately trifoliate. Fls. mostly yellow. 



1. L. VULGARE. (Cytisus Laburnum. Linn.} Golden Chain. Arborescent; 

 If is. oblong-ovate, acute at base, acuminate ; rac. simple, elongated, pendulous; 

 leg. hirsute. A small, ornamental tree, 15f high, from Switzerland. Flowers 

 numerous, large, in racemes If long, f 



2. L. ALPlNUM. (Cytisus alpinus. Linn} Scotch Laburnum. Arborescent ; 

 Ifts. oblong-ovate, rounded at base ; rac. long, simple, pendulous ; leg. glabrous. 

 A beautiful tree, 30f high, native of various alpine regions of Europe. Like 

 the former, it develops numerous, brilliant yellow flowers, in long, drooping clus- 

 ters. There are varieties with ochroleucous, white, and even purple flowers, -j- 



33. BAPTISIA. Vent. 

 Gr. -/JaTrro), to dye ; a use to which some species are applied. 



Calyx 4 5-cleft half-way, persistent ; petals of about equal length, 

 somewhat united ; vexillum orbicular, emarginate ; stamens 1 0, dis- 

 tinct, deciduous : legume inflated, stipitate, many (or by abortion 

 few)-seeded. % Lvs. palmately 3-foliate, or simple. < 



1. B. TINCTORIA. R. Br. (Sophora. Linn. Podalyria. Lam.} Wild Indigo. 



Glabrous, branching ; Irs. palmately 3-foliate, subsessile ; Ifts. roundish- 

 obovate, acute at base, very obtuse at apex; stip. setaceous, caducous; rac. 



