18 RANUNCULACEAE. 



2. P. rotundata Griseb. Shrub or small tree, the bark pale: leaf -blades 

 thick, broadly oblong or oval, varying to obovate, 2.5-8 cm. long, short- 

 petioled: cymes densely flowered: calyx green or whitish, broadly funnel- 

 form, about 3 mm. long, tomentulose along the edge: fruits broadly or nar- 

 rowly obovoid, 5-6 mm. long. PISONIA. 

 Hammocks, F. Keys. (W. I.) 



2. TOBBUBIA Veil. Unarmed shrubs or trees. Leaves opposite: blades 

 entire. Flowers in cymes. Calyx narrowly funnelform to tubular, with an 

 erect nearly or quite even edge. Fruits juicy, without glands. Spr.-sum. 



Leaf-blades glabrous : inflorescence-branches glabrous In age. 1. T. longifolia. 



Leaf-blades copiously pubescent : inflorescence-branches permanently 



pubescent. 2. T. floridana. 



1. T. longifolia (Heimerl) Britton. Shrub or small tree, the bark pale: 

 leaves 3-7 cm. long; blades spatulate to obovate, oblong-spatulate, or oval- 

 spatulate: cymes open; calyx green or greenish, or purplish, narrowly funnel- 

 form, 3-3.5 mm. long, the erect edge glabrous: fruit broadly or narrowly 

 obovoid, 5-6 mm. long. BLOLLY. 



Coastal hammocks, s. pen. Fla. and those of the E. Keys and F. Keys. (W. I.) 



2. T. floridana Britton. Low shrub: leaves 2-3.5 cm. long; blades spatulate: 

 fruits slightly broadened upward, 6-7 mm. long. 



Hammocks, Rock Key, west of Key West. (Endemic.) 



Order RANALES. 



Herbs, shrubs, or trees. Leaves mostly without stipules, with entire 

 or dissected blades, in aquatics often various on the same plant. Flowers 

 perfect, monoecious, or dioecious. Calyx and corolla of distinct sepals 

 and petals. Androecium of usually more hypogynous stamens than there 

 are sepals. Gynoecium of 1 or several distinct or united carpels. Ovary 

 superior. Fruit various. 



Carpels 1 or more, distinct, at least at maturity. 



Sepals 3-15 : petals about as many : plants if shrubby not with pulpy fruit : endo- 

 sperm even. Fam. 1. RANUNCULACEAE. 

 Sepals 5 : petals 6 : fruit pulpy : endosperm channeled. Fam. 2. ANNONACEAE. 

 Carpels more or less coherent or united into cone-like 



structures, or immersed in the pulpy receptacle. 



Sepals valvate. Fam. 2. ANNONACEAE. 



Sepals imbricate. Fam. 3. MAGNOLIACEAE. 



FAMILY 1. RANUNCULACEAE. CROWFOOT FAMILY. 



Herbs or woody vines. Leaves alternate (opposite in Clematideae) : 

 blades simple or compound. Calyx of 3^5 imbricate (valvate in Clema- 

 tideae) sepals. Corolla of about as many petals as there are sepals, oc- 

 casionally more, or wanting. Androecium of several or many hypogynous 

 stamens. Gynoecium of 1, several or many distinct carpels. Fruit an 

 achene, a follicle or baccate. 



1. XANTHOKRHIZA L'Her. Weak shrubs. Leaf -blades 1-2-pinnate. 

 Flowers paniculate. Sepals 5, brownish-purple, deciduous. Petals 5, gland- 

 like. Stamens 5 or 10 : filaments stout. Carpels few, sessile, 2-ovuled, in fruit 

 forming a whorl of follicles. 



1. X. apiifolia L'Her. Plants 2-6 dm. tall: leaves approximate: leaflets 

 mostly 5, the blades ovate to oblong, 2.5-7.5 cm. long, incised-toothed or 



