POLYGOXACEJE. (BUCKWHEAT FAMILY.) 413 



5. COCCOLOBA, Jacq. 



Flowers perfect. Calyx herbaceous. 5 parted, the tube enlarged and more 

 or less th'sh y in fruit. Stamens 8. Filaments subulate. Styles 3: stigmas 

 entire. Acheimnii nearly globose, included in anil partly united with the per- 

 sistent calyx. Kmbryo straight in the axis of mealy albumen. Trees or 

 shrubs, with alternate leaves, truncate sheaths, and small greenish flowers in 

 axillary and terminal racemes. 



1. C. UVifera, Jacq. (SEA GRAPE.) Smooth; leaves short-petioled, 

 coriaceous, orbicular-cordate or reniform ; racemes terminal, rigid, erect; 

 pedicels single ; stamens included ; acheuium ovate, acute. South Florida, 

 along the coast. A small tree, with rigid spreading branches. Leaves 3'- 5' 

 wide, very thick. Racemes 6' long. 



2. C. Floridana, Meisner. Smooth ; leaves petioled, somewhat coria- 

 ceous, elliptical, obtuse at each end ; racemes slender, terminal and on short 

 lateral branches, recurved ; pedicels 2-3 together, about the length of the 

 calyx; stamens exserted ; achenium ovoid, obtuse. South Florida. A 

 small tree. Leaves 2' -3' long. Sheaths loose, brown. Racemes 2' - 3' long. 

 Achenium 4" - 5" long. 



6. BRUNNICHIA, Banks. 



Flowers perfect. Calyx bell-shaped, 5-parted, the tube enlarged in fruit 

 and enclosing the free acheuium. Stamens 8 or 10. Styles 3, slender: stig- 

 mas entire. Ovule borne on a slender cord from the base of the ovary, pen- 

 dulous. Acheuium obtusely 3-angled. Seed 6-fnrrowed. Embryo in one of 

 the angles of the mealy albumen. A smooth vine, climbing by terminal 

 tendrils. Leaves ovate or cordate-ovate, petioled, acute, deciduous. Sheaths 

 obsolete. Flowers greenish, in axillary and terminal racemes, on slender 

 pedicels, which become indurated and flattened in fruit. 



1. B. cirrhosa, Banks. River banks, Florida to South Carolina. April - 

 May. Stem shrubby, 10 -20 long. Leaves 2' -3' long. Racemes 3'-6' 

 long. Bracts ovate, acuminate, 3 - 5-flowered. Fruiting pedicels curved. 



7. ERIOGONITM, Michx. 



Flowers perfect or polygamous, surrounded by an involucre. Calyx deeply 

 6-cleft. Stamens 9. Ovary free, 3-sided. Styles 3 : stigmas capitate. Ache- 

 nium 3-angled or 3-winged. Embryo straight in the axis of the albumen, or 

 more or less curved. Downy or woolly herbs. Leaves alternate, opposite or 

 whorled. Sheaths none. Inflorescence various. 



1. E. longifolium, Xutt. Stem erect, tomentose, corymbose above, 

 leafy below; lowest leaves clustered, oblong-linear, long-tapering at the base,, 

 the upper scattered, the uppermost bract-like ; involucre stalked ; calyx her- 

 baceous, equal. Sand ridges. East Florida. If. Stem 2 -3 high. Low- 

 est leaves 3' - 5' long. 



2. E. tomentosum, Michx. Stem erect, tomentose, corymbose above, 

 leafy throughout ; lowest leaves clustered, obovate-oblong, long-petioled, the 

 others in whorls of 3 - 4, elliptical, sessile ; involucre sessile ; calyx white, un- 



