122 PULSE FAMILY. 



a little pulp or s\vei'ti>h matter inside, containing few or several larg< and tliiek hard 

 seeds (over J' iu diameter) ; tlie tieshy cotyledons remaining uudergroiiiid in jrernii- 

 natioD. 

 50. GLEDITSCHIA. Thorny trees, with abruptly twice-pinnate or some of them once- 

 pinnate leaves, the leaflets often crenate-toothed, inconspicuous stipules, and small. 

 greenish, polygamous flowers in narrow racemes. Calyx 3-5-cleft, the lobes and the 

 3-5 nearly similar petals narrow and spreading. Stamens 3-10. Pod flat, very tar- 

 dily opening, often with some sweetish matter around the l-.several flat seeds. 

 Cotyledons thin. 



III. MIMOSA SUBFAMILY. Flowers perfectly regu- 

 lar, small, croAvded in heads or spikes ; both calyx and corolla 

 valvate in the Inid ; and the 4 or 5 sepals usually, and petals fre- 

 quentlj', united more or less below into a tube or cup. Stamens 

 4, 5, or more, often very many, usually more conspicuous than 

 the corolla and brightly colored, the long capillary filaments 

 inserted on the receptacle or base of the corolla. Embryo of 

 the seed straight. Leaves almost always twice-pinnate and with 

 small leaflets, or apparently simple and parallel-veined when 

 they have phyllodia (Lessons, p. 61) in place of true leaves. 

 The foliage and the pods only show the leguminous character. 



* stamens once or twice as many as the petals, 1-10. Ottrs herbs or neariy so, with 

 rose-colored or whitish flowers, and leaves of many small leaflets. 



57. MIMOSA. Calyx commonly minute or inconspicuous. Corolla of 4 or 5 more or less 



united petals. Pod flat, oblong, or linear ; when ripe the valves fall out of a per- 

 sistent, slender margin or frame, and also usually break up into one-seeded joints. 



58. 8CHEANKIA. Calyx minute. Corolla funnel-form, the 5 petals being united up to 



the middle. Stamens 10. Pod rough-prickly all over, long and narrow, splitting 

 lengthwise when ripe into 4 parts. 



59. DESMANTHUS. Calyx 5-toothed. Corolla of 5 separate petals. Stamens 5 or 10. 



Pod flat, smooth, linear or oblong, 2-valved, no persistent margin. 



* * Stamens numerous, or more than 10. Ours all shrubs or trees. 

 CO. ALBIZZIA. Flowers yellow or rose-color to nearly white ; the long stamens mona- 



delphous at the base. Corolla funnel-form, the 5 petiils united beyond the middle. 



Pod flat and thin, broadly linear, not opening elastically. Leaves twice innnatc. 

 61. ACACIA. Flowers yellow or straw-color ; the stamens separate and very numerous. 



Corolla of 4 or ."i separate or partly united small petals. Pod various. 



1. CHORIZEMA. ((ireok, of no application.) U. (ireen house plants 

 from Au.stralia. 



C. ilicifdlium, Labill. Hou.y-lkaved C. Bushy, with lance-oblong 

 leaves cut into strong spiny teeth or lobes, and racemes of small copper- 

 colored flowers, the wings redder. 



C. varium, Benth. Leaves round-cordate, nearly sessile, spiny-toothed 

 or entire ; flowers yellow and red. 



2. BAPTISIA, FALSE INDIGO. (Greek: d//e, some species yielding 

 a poor sort of indigo.) Foliage of most species turning blackish in 

 drying ; nearly all grow in sandy or gravelly dry soil ; flowers spring 

 and early summer. Il 



