ORDER 46. LEGUMLNOS^E. 299 



a foot high. Lfts. about 3" long, very numerous. Fig. small, capitate. It is oc- 

 casionally cultivated for the curiosity of its spontaneous motions ; the leaves bend- 

 ing, folding, and apparently shrinking away from the touch of the hand. 



2. SCHRAN'KIA, Willd. SENSITIVE BRIER. (In honor of Francis 

 de Paula Schrank, a German botanist.) Flowers $ ; calyx minute, 

 5-toothed ; petals united into a funnel-shaped, 5-cleft corolla ; stamens 

 8 to 10, distinct or rnonadelphous ; legume long and narrow, echinate, 

 dry, 1-celled, 4-valved, many-seeded. ^Prickly herbs. St. procum- 

 bent. Lvs. sensitive, bipinnate. Fls. in spherical heads, purplish. 



S. uncinata Willd. St. angled, grooved; pinnaj G to 8 pairs; Ifts. numerous, 

 minute, elliptic-oblong or linear; hds. axillary, 1 to 2 together, on peduncles 

 shorter than the Ivs. ; leg. long and slender, very prickly. Dry soils, Clark Co., 

 Mo. (Mead), and Southern States. St. 2 to 4f long, and with the petioles and pe- 

 duncles armed with short, sharp prickles turned downwards. Lfts. about 2" by 

 i". Fed. 2 to 3' long, hds. 1 to V diam. Pods 2 to 4' long. May Jl. (S an- 

 gustata T. & G.) 



3. VACHEL'LIA, W. and Atn. SPONGE TREE. Stamens very nu- 

 merous, distinct; legume cylindrical, turgid, scarcely dehiscent; seeds 

 in a double row, imbedded in pulp. Otherwise as in Acacia. Tree 

 armed with straight, stipular spines. Lvs. bipinnate, with a gland. Fls. 

 in globular heads, yellow. 



V. Farnesiana W. & Arn. Pinnae 4 to 8 pairs ; Ifts. 15 to 20 pairs, veiny, ob- 

 long, crowded ; ped. 2 or 3 together. Grows about N". Orleans (Hale) and along 

 the Gulf to St. Marks, Fla. Lfts. about 2" long. Pods 2 to 3" long, blackish 

 when ripe. Said to yield gum. 



4. DESMAN THUS, Willd. (Gr. <Je<7p), a bundle, dvOos, flower.) 

 Flowers or $ ; calyx valvate, campanulate, 5-toothed ; petals 5, 

 distinct; stamens 5 or 10, distinct; legume dry, flat, 2-valved, 4 to 

 6-seeded, smooth. Herbs with bipinnate Ivs. and white fls. in axillary, 

 pedunculate heads. Stip. setaceous. Petioles with one or more glands. 

 D. brachy-lobus Benth. Erect, smoothish; pinnse 6 to 13 pairs, Ids. minute, 20 



to 30 pairs; fls. all perfect, pentandrous; pods short (!' long), oblong, somewhat 

 curved, 2 to 4-seeded, and crowded. T\- Along the Miss, from 111. to La. Sts. 

 striate, 1 to 3f high. Jn. Aug. (Darlingtonia brachyloba and glandulosa DC.) 



5. AC ATI A, Necker. (Gr. a/ca^cj, to sharpen ; alluding to the spines.) 

 Flowers polygamous ; calyx valvate, 4 to 5-toothed ; petals 4 or 5, united 

 below, rarely distinct ; stamens 8 to 200 ; legume continuous, not 

 jointed, dry, 2-valvcd, many-seeded. Trees, shrubs or herbs, spineless, 

 or with stipular spines. Lvs. (in the 1ST. Am. species) bipinnate. Fls. 

 in heads or spiked. (This is a large and ornamental genus of chiefly 

 tropical plants, much cultivated in the -greenhouse. In many of them 

 the leaflets disappear and phyllodia ( 307) take their places.) 



1 A. lutea Leav. Prostrate, herbaceous, minutely strigous; stip. lance-subulate; 

 pinnoB 3 to 5 pairs, Ifts. 12 to 20 pairs, very small (2" long); hds. oblong-cylindric, 

 the peduncles longer than the leaves ; fls. yellow, decandrous ; pods broad and 

 flat, obtuse, about 6-seeded, and raised on a slender stipe. Prairies Fla., La. and 

 Ala. Its herbage much resembles Mimosa strigillosa, except the stipules. Pods 

 1 to 2' long, 8" wide, the stipe about 6''. Lvs. ciliate, sensitive, with no glands. 



2 A. Julibrassin Willd. Tree glabrous, unarmed ; pinna 8 to 1 2 pairs, Ifts. 20 

 to 30, halved, acute, inequilateral: gland depressed at the base of the petiole; hds. 

 pedunculate, forming a terminal panicle ; stam. numerous/ long, exserted. A very 

 ornamental tree cultivated and sparingly naturalized in the Gulf States. Corollas 

 white, with purplish stamens. Pods large, pointed at both ends, contracted be- 

 tween the seeds. 



