POLYGOI^fACE.E. (BUCKWHEAT FAMILY.) 413 



5. COCCOLOBA, Jacq. 



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

 or less fleshy in fruit. Stamens 8. Filaments subulate. Styles 3 : stigmas 

 entire. Acheuium nearly globose, included in and partly uniteil with the per- 

 sistent calyx. Embryo 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 reuiform ; racemes terminal, rigid, erect; 

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

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

 wide, very thick. Kacem.es 6' long. 



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

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

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

 calyx ; stamens exserted ; acheuium 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 achenium. Stamens 8 or 10. Styles 3, slender: stig- 

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

 dulous. Achenium obtusely 3-angled. Seed G-furrowed. 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. — StcMu shrubby, 10°- 20° long. Leaves 2' -3' long. Racemes 3' -6' 

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



7. ERIOGONUM, 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. Embr}-o straight in the axis of the allmmen, or 

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

 whorled. Sheaths none. Inflorescence various. 



1. E. longifolium, Nutt. 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. IJ. — Stem 2® -3° high. Low- 

 est leaves 3' - 5' long. 



2. E. tomentosum, Michx. Stem erect, tomentose, con'mbose above, 

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

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



