392 POLYGOXACi:.E. (bUCKAVUEAT lAMlLV.) 



single ; stamens included ; achcnium ovate, acute. — South Florida, along the 

 coast. — A shrub or small tree, with rigid spreading branches. Leaves 3' - 5' 

 wide, very tliitk. Racemes G' long. 



2. C. Floridana, Mcisner. Smooth ; leaves pctioled, somewhat coria- 

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

 lateral branches, recun'ed ; pedicels 2-3 together, about the length of tlie 

 calyx ; stamens exscrted ; achcnium ovoid, obtuse. — South Florida. — A small 

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

 uium 4" -5" long. 



6. BRUNNICHIA, Banks. 



Flowers perfect. Calyx bcll-shapcd, 5-partcd, the tube enlarged in fruit and 

 enclosing the free achcnium. Stamens 8 or 10. Styles 3, slender : stigmas 

 entire. Ovule borne on a slender cord from the base of the ovary, pendulous. 

 Achcnium obtusely 3-anglcd. Seed 6-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. Sheaihs 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 

 and May. — Stem shrubby, 10°- 20° long. Leaves 2' - 3' long. Racemes 3'- 

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



7. ERIOGONUM, Miehx. 



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

 6-clcft. Stamens 9. Ovaiy free, 3-sided. Styles 3 : stigmas capitate. Achc- 

 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, Nutt. Stem erect, tomentose, corymbose above, leafy 

 below ; leaves smootii or villous above, white-tomentose beneath, the lowest clus- 

 tered, oblong-linear, long-tapering at the base, the upper scattered, the uppermost 

 bract-like ; involucre stalked, many-flowered, obtusely ."i-toothed ; calyx herba- 

 ceous, equal, woolly without. — Sand ridges, East Florida. H. — Stem 2° -3° 

 high. Lowest leaves 3'- 5' long. 



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

 leafy throughout ; leaves smooth above, white tomentose beneath, the lowest 

 clustered, oboyate-oblong, long-pctioled, the others in whorls of 3 - 4, elliptical, 

 sessile ; involucre sessile, obtusely .5-toothed ; calyx white, unequal, woolly with- 

 out — Dry pine barrens, Florida to South Carolina. July- Sept. % — Stem 

 20-3° high. Lowest leaves 4'- 6' long. Flowers very numerous on one side 

 of the spreading branches. 



