466 FLORA OF TEXAS. 



capitate or many-cleft; utricle indeliiscent, 1-seeded, in- 

 cluded 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. 



F. Floridana, Moquin. White-tomentose or woolly; 

 stem erect, simple or branched ; leaves varying from linear 

 to oblong; spikes ovate or oblong, lengthening with age; 

 tracts mostly blackish, shorter than the woolly calyx ; style 

 short; stigma csLi-fitnte; fruit i?ig calyx round-ovate, com- 

 pressed, toothed along the margins, and minutely tuber- 

 cled at the base. Dry sandy places. July-September. 

 Stem J°-3° high ; spikes solitary, few, or numerous. 



102. BUCKWHEAT FAMILY. Order, Polygonace^. 



Herbs, shruls, or (tropical) trees, with simple mostly al- 

 ternate and stipulate leaves, and perfect or ^lOdCioM^ 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 orthotropous ovule erect 

 from the base of the cell ; styles 2-3, distinct or partly uni- 

 ted ; fruit (achenium) lenticular or 3-angled, rarely ovoid ; 

 embryo mostly 6n the outside of mealy albumen ; radicle 

 pointing upward ; stipules sheathing, annular, or wanting. 



SYNOPSIS. 



Sub-order I. Polygonese. Involucre none. Calyx 

 5-cleft or 5-sepalous. Stamens 4-9 (mostly 5-8). Ovules 

 sessile. Embryo curved on the outside of the albumen, 

 rarely straight in its center. Stipules sheathing. 



* Calyx b-sepalous, the inner sepals erect, mostly enlarged in fruit. 



Calyx green, often grain-hearing. Stigma many-cleft Rujiex. 



corolla-like. entire Polygon klla. 



** Calyx 5-sepalous, ike sepals all erect, unchanged in fruit, free from the aclienium. 



Sepals entire. Embryo curved on the outside of the albumen Poltoonum. 



