264 



PAPILIONACEAE. 



[VOL. II. 



2. CLADRASTIS Raf. Neogenyton, i. 1825. 



Trees, with odd-pinnate leaves, no stipules nor stipels. Flowers showy, white, in termi- 

 nal panicles. Calyx-teeth 5, short, broad. Standard orbicular-obovate, reflexed; wings ob- 

 long; keel incurved, obtuse, its petals distinct. Stamens 10, all distinct; filaments slender; 

 anthers all alike, versatile. Ovary sessile or nearly so; ovules few; style incurved. Pod lin- 

 ear or lanceolate, short-stalked, flat, at length 2 valved, few-seeded. [Greek, brittle-branch.] 



A genus of 2 known species, i of the eastern United States, the other of Mantchuria. 



i. Cladrastis lutea (Michx.) Koch. American or Kentucky Yellow-wood. 



(Fig. 2046.) 



Virgilia lutea Michx. f. Arb. Am. 3:266. pi. j. 1813. 

 Cladrastis fragrans Raf. Cat. Bot. Gara. Trans. 12. 



Name only. 1824. 



Cladrastis tinctoria Raf. Neogenyton, i. 1825. 

 Cladrastis lutea Koch, Dendrol. x:6. 1869. 



A smooth-barked tree, with maximum height 

 of about 50 and trunk diameter of about 3#. 

 Foliage nearly glabrous; leaves petioled; leaflets 

 5-11, ovate, oval or obovate, stalked, 2'~4' long, 

 pointed or blunt-acuminate at the apex, obtuse 

 or the terminal one cuneate at the base; panicles 

 many-flowered, drooping, io / -2o / long; pedicels 

 slender, 5 "-9" long; calyx tubular-campanulate; 

 corolla white, about i' long; pod short-stalked, 

 glabrous, 2 / -4 / long, 4 // -5 // wide, 2-6-seeded. 



In rich soil, Kentucky, Tennessee and western 

 North Carolina. Wood yellow, hard, strong, yield- 

 ing a yellow dye ; weight per cubic foot 39 Ibs. Flow- 

 ers fragrant. June. 



3. THERMOPSIS R. Br. in Ait. Hort. Kew. Ed. 2, 3: 3. 1811. 



Perennial branching herbs, with sheathing scales at the base, alternate 3-foliolate leaves, 

 and large yellow or purple flowers in terminal or axillary racemes. Stipules usually lar^c 

 and foliaceous. Calyx campanulate or short-turbinate, its lobes equal and separate, or the two 

 upper ones united. Standard nearly orbicular, equalling the oblong wings and about equal- 

 ling the keel. Stamens 10, incurved, separate. Ovary sessile or short-stipitate; ovules o> ; 

 style slightly incurved; stigma terminal, small. Pod sessile or short-stalked, flat (in our 

 species), linear or oblong, straight or curved. [Greek, Lupine-like.] 



About 15 species, natives of North America and northern and eastern Asia. Besides the follow- 

 ing, 5 others occur in the southern Alleghanies and in the western part of the continent. 



Leaflets i'-a' long; panicle elongated, usually long-peduncled; eastern. i. T. mollis. 



Leaflets M'-i' long; panicle short, short-peduncled; western. 2. T. rhombifolia. 



i. Thermopsis mollis (Michx.) M. A. Cur- 

 tis. Alleghany Thermopsis. (Fig. 2047.) 



Podalyria mollis Michx. Fl. Bor. Am. i: 264. 1803. 

 Baptisia mollis DC. Prodr. 2: 100. 1825. 

 Thermopsis mollis M. A. Curtis; A. Gray, Chlor. Bor. Am. 

 47. pi. o. 1846. 



Erect, somewhat divaricately branched, 2-3 high, 

 finely appressed-pubescent. Leaves petioled, 3-folio- 

 late; leaflets oval, rhombic-elliptic or obovate, entire, 

 i / -2 / long, g^-is" wide, obtuse or acute, nearly ses- 

 sile; stipules ovate or lanceolate, shorter than the pet- 

 iole; racemes 6 / -io / long, mainly terminal; pedicels 

 2"-6 // long, bracted at the base; flowers yellow, about 

 9" long; pod short-stalked in the calyx, linear, slightly 

 curved, about 4' long. 



Southwestern Virginia and North Carolina, in the 

 mountains. July-Aug. 



