238 XL VII. ROSACE.^. 



Suborder 3.— M I M O S E iE . 



Sepals and petals valvate in aestivation, subregular. Stamens 5 — 200. 



Embryo straight. — Leaves abruptly pinnate or bipinnate. 



38. MIMOSA. 



Gr. pt/ios. a buffoon ; the leaves seem? sporting witti the hand that touches them. 



Flowers 9 $ d"- ^ Calyx 5-tootlied ; corolla 0, or 5-tootlied ; sta. 

 4—1.5 : legume separated into 1 -seeded joints ; d" like the perfect, but 

 without ovaries or fruit. — % Hbs. and shrubs, natives of tropical Amer. S^c. 



M. puDiCA. Sensitive Plant.— SI. prickly, more or less hispid ; tvs. digitate- 

 pinnate ; pinnce 4, of many (20 or more) pairs of linear leaflets.— Native ol Bra- 

 zil Stem shrubby, about a foot high. Leaflets about 3" long, very numerous 

 Flowers small, capitate.— It is occasionally cultivated for the mterest excited 

 by its spontaneous motions,— the leaves bending, folding, and apparently shrink- 

 ing away from the touch of the hand. 



39. SCHRANKIA. Willd. 



In honor of Francis de Paula Schrank, a German botanist 



Flowers ? d" ; calyx minute, 5-toothed ; petals united into a funnel- 

 shaped, 5-cleft corolla: stamens 8 — lO.distinctor monadelphous; legume 

 echinate, dry, 1-celled, 4-valved, many-seeded: — %- Prickly herbs. St. 

 'procumbent. Lvs. sensitive, bipinnate. Fls. in spherical heads, purplish. 



S. uxciXATA. Willd. (Mimosa horridula. Michx.) Sensitive Brier. 



St. angled, grooved; pinna: 6—8 pairs; Ifts. numerous, minute, elliptical, 

 reticulated beneath; kds. solitary, on peduncles shorter than the leaves; leg. 

 very densely clothed with prickles.— Dry soils, Clark Co., Mo. Mead, and 

 SouLthern States. Stem 2 — If long, and with the petioles and peduncles armed 

 with short, .sharp prickles turned downwards. Leaflets about 2" by h". Pedun- 

 cles 2—3' long, heads i—h' diam. May— Jl. 



40. DARLINGTONIA. DC. 



In honor of Hon. Wm. Darlington, of Penu., author of Flora Cestrica, &c. 



Flowers $ ; calyx campanulate, 5-toothed ; petals 5, distinct ; sta- 

 mens 5, distinct ; style filiform : stigma minute, funnel-shaped ; 

 legume lanceolate, dry, 2-valved, 4— 6-seeded. — % Unarmed and gla- 

 brous herbs. Lvs. abruptly bipinnate ; Ifts. very numerous. Fls. ivhite, in 

 axillary, pedunculate heads. 



D. BRACHYLOBA. DC. (Dcsmanthus. Benth.) 



a. Illinocnsis. T. & G. (Mimosa Illinoensis. Michx.) Pinna. G — 11 

 pairs with a gland between the lowest pair only ; stems numerous, difiuse ; leg. 

 sli^^htlv falcate.— Prairies and bottoms, 111. to La. Stems 2— 3f high, simple, 

 striate' Leaves 2 — M long. Leaflets linear-oblong, subfalcate, obtuse at each 

 end 2^" by \" . Legumes crowded, f ' long. Jn. Aug.— This genus is reduced 

 by Bentham to Desmanthus, Willd., but there are numerous genera based on 

 less important distinctions than this ; c. g. Vicia and Lathyrus. 



Order XLVIII. ROSACEA. 



Trees, shrubs or herbs. Leaves alternate. 



Stipules usually large or conspicuous, sometimes none. 



F/« reeular. commonly showy, rarely dia-cious 



rrt/—Senals 5 rarely fewer, united, often reinforced by as many bracts. 



Cor -Petals .5 regular, rarely wanting, inserted on the disk which lines the onfice of the calyx. 



<5//r on iisuallv numerous, arising from the caly.x, distinct. 



Ora superior, 1 orTeveral, di.stinct. l-celled, often coherent to the sides of the calyx and each other. 



Srw/e* distinct or united. Fri/?7a drupe, pome, achenia or lollicle. 



This order as here constituted, consists of three suborders, which by Lindley are regarded aa separate 

 orLrs- viz :iw2/S'e^ P«»'««;and Rosacea^ ,,roper, to which is added Chnjsobala7,ecc, not represented 

 ?n th?s'flora ThS generk and species in each suborder are estimated by Lindley as follows : 

 inimsnora. mce Chrysobalaneaj, 11 genera, 50 species. 



Amygdaleaj, 5 '' HO ' 



Pomes, 16 ' 200 



Rosaceae proper, 50 " 6'25 



Total. R2 " 985 



