80 ORDER 43. LEGUMINOS^. 



1 5 P. cymosa Walt. Tall, corymbously branched at top ; Ivs. mostly radical, linear, 

 pointed, crowded ; stem Ivs. very few, linear-subulate ; racemes spike-like, forming a 

 dense, fastigiate cyme ; seed globular, naked. @ Swamps, S. 2 5f. Jnne-K 



16 P. verlicillata L. St. branched above, erect; Ivs. linear, verticillate both on 

 the stem and opposite branches ; fls. crested : calycine wings roundish ; seed oblong, 

 smooth, caruncle hardly half as long. (T) Dry hills, fi 8'. July + . 



ft. tinibiztia. Branches and upper Ivs. alternate ; spikes long; fls. scattered. 



17 P. Boy Ri nil T. & G. Sts. erect from an ascending base, simple; Ivs. obovat'e 

 and lanceolate ; spike slender, pointed, dense ; caruncle two-thirds the length of the 

 vory hairy seed. U South. 1318'. June Aug. 



18 P. leptostacliys Shuttl. Sts. filiform, strict; Ivs. setaceous, in 4's or 5's, re- 

 mote ; spikes linear ; seed smooth. (T) Dry sands, Fla. If. Greenish. 



19 P. Hooker! T. & G. Sts. weak, 4-angled; Ivs. in 4's, linear; spikes lance-ovate, 

 pointed. Pine woods, Fla. to Tex. If. Flowers pale red. 



20 P. cruciata L. St. erect, winged at the angles, fastigiate ; Ivs. in 4's, linear-ob- 

 long, punctate ; spikes ovate, dense, obtuse, subsessile ; caruncle as long as the ovoH 

 smooth seed. (T) Wet grounds. 312'. July, Aug. 



ft. cuspidata. Lvs. linear; heads squarrous with the wing-cusps. South. 



21 P brevifolia Nutt. Slender, branched above; Ivs. linear, short, remote, in4'e, 01 

 on the branches scattered ; spike oblong, dense, obtuse, on long peduncles ; wing-s 

 ovate-lanceolate, acute ; seed just as in No. 20. (T) N. Y. to Fla. If. Augut. 



22 P. spEcidsA. Shrub 6f ; Ivs. c0neate-oblong, alternate ; fls. purple, in terminal rac. 



23 P. MYRTIPOLIA. Shrub 3 4f ; Ivs. oblong-obovate, alteni. ; fls. purple, in lateral rac. 



24 P. OPPOsiTirdLiA. Shrub 3f ; Ivs. opp., sessile, cordate, smooth ; fls. roseate, large. 



25 P. LATIFOHA. Shrub 3f ; Ivs. opposite, ovate, glaucous, downy bemeath ; fls. purple. 



2. KRAMERIA, L. Ovary 1-celled, with 2 collateral ovules. Seed 

 with no caruncle and no albumen. ^> Racemes terminal. 

 K. lanceolata Torr. Prostrate ; Ivs. lance-lin., acute, longer than ped. -, fr. spiny. Fla 



ORDER XLIII. LEGUMINOS^E. LEGUMINOUS PIANTS. 



Herbs, shrubs, or trees. Leaves alternate, usually compound, margins eu- 

 tire. Stipules 2, at the tumid base of the petiole. Stipels commonly 2. Se- 

 r als 5, more or less united, often unequal, the odd one always anterior. 

 Petals 5, either papilionaceous or regular, perigynous, the odd one (when 

 present) posterior. Stamens diadelphous, monadelphous, or distinct. An- 

 thers versatile. Ovaries superior, single, and simple. Style and stigma 

 Bimple. Fruit a legume, either continuous (1-celled), or (a loment) jointed 

 into 1-seeded cells. Seeds solitary or several, destitute of albumen. Figs. 

 50, 60, 102, 157, 190-1, 203-4, 214, 233, 308, 354-6, 361-2, 397, 401-2, 480. 



A vast and important order, containing 400 genera and 6,500 species, of 

 which 350 are native in the United States. 



I. MIMOSE^E. Corolla regular, valvate in bud. Stamens exserted, hypogynous. Lvs. bipinnate. ..() 



II. C^ESALPINE^E. Corolla irregular, upper petal interior in bud. Stamens 510, perigynous... () 



III. PAPILIONACE^E. Corolla papilionaceous, upper petal (the banner) larger and exterior... (> 



* Stamens 10, all distinct to the base. Plants erect. (Tribe PODALYKIK^)...(!) 



Stamens 10, monadelphous or diadelphous... (**) 



* Leaves cirrhous, ending with a tendril. Stamens 9 and 1. Vines. (Tribe ViClE.at)...(2) 



** No tendrils. Pod a loment ( 165), or rarely 1-seeded. Lvs. pinnate. (Tr. HEDYSARKjt)...(3> 



* JIo tendrils. Pod a legume ( 165), rarely 1-seeded... (***) 



*** Erect (or if prostrate, with palmatety 3-foliate leaves). (Tribe Lorns). . .(4) 



*** Twining or trailing vines, wiib piunately compound leaves. (Tribe PHASEOl.KJl)...(5) 



