384 POLYGONACEJE. (BUCKWHEAT FAMILY.) 
sessile. Stigma capitate or many-cleft. Utricle indehiscent, 1-seeded, included . 
in the calyx. Seed vertical. Radicle ascending. — Woolly or hairy annuals. 
Leaves opposite. Spikes opposite, and terminating the naked peduncle-like 
summit of the stem. 
1. F. Floridana, Moquin. White-tomentose or woolly ; stem erect, sim- 
ple or branched ; leaves varying from linear to oblong; spikes ovate or oblong, 
lengthening with age; bracts mostly blackish, shorter than the woolly calyx; 
style short; stigma capitate ; fruiting calyx round-ovate, compressed, toothed 
along the margins, and minutely tubercled at the base. (Oplotheca Floridana, 
Nutt.) — Dry sandy places, Georgia, Florida, and westward. July- Sept. — 
Stem 39-3? high. Spikes solitary, few, or numerous. 
ORDER 110. POLYGONACEZJE. (BUCKWHEAT Fawn.) 
Herbs, shrubs, or (tropical) trees, with simple mostly alternate and. 
stipulate leaves, and perfect or diccious flowers. — Calyx 3- 6-cleft, or 
3 — 6-sepalous, persistent. Stamens 4-12, inserted on the base of the 
calyx: anthers 2-celled. Ovary single, 1-celled, with the solitary ortho- 
tropous ovule erect from the base of the cell. Styles 2-3, distinct or 
partly united. Fruit (achenium) lenticular or 3-angled, rarely ovoid. 
Embryo mostly on the outside of mealy albumen.  Radicle pite d 
upward. — Stipules sheathing, annular, or wanting. 
Synopsis. 
SUBORDER I. POLYGONEZE. Involucre, none. Calyx 5-cleft or 
5-sepalous. Stamens 4—9 (mostly 5—8). Ovules sessile. 
curved on the outside of the albumen, rarely straight in its centre 
Stipules sheathing. 
* Calyx 5-sepalous, the inner sepals erect, mostly enlarged in fruit. 
1. RUMEX. Calyx green, often grain-bearing. Stigmas many-cleft. 
2. POLYGONELLA. Calyx corolla-like. Stigma entire. 
* * Calyx 5-sepalous, the sepals all erect, unchanged i in fruit, free from the schenium. 2 
3. POLYGONUM. Sepals entire. Embryo curved on the outside of the albumen. A 
4. THYSANELLA. Inner sepals fimbriate. Embryo straight at the side of the albumen- 
EE e 5-parted, the tube enlarged and fleshy in frait, and partly united with the 
achenium. $ 
& 'COCCOLOBA. Achenium ovoid or globose. Trees. 
Sunorper IL BRUNNICHIEJE. Involucre none. Calyx 5-parteh — 
the tube enlarged and indurated in fruit. Stamens 8. Ovule borne ot - 
a slender stalk. _ Embryo at the margin of the albumen. Sa 
E BRUNNICHIA. Piah sinen in fruit. Climbing shrubs- 2 
