POL YGONUM 
539 
I. RUMICOIDEAE. 
1. Enogoneae (no ochrea) : Chorizanthe, Eriogonum. 
2. Rumiceae (ochreate) : Rumex, Rheum, Oxyria. 
B. Acyclic (except a few Coccoloboideae) 
II. POL YGONOIDEAE (endosperm not ruminate). 
3. Atraphaxideae (shrubs) : Calligonum. 
4. Polygoneae (herbs) : Polygonum, Fagopyrum. 
III. COCCOLOBOIDEAE (ruminate). 
5. Coccolobeae (usually £ ) : Muehlenbeckia, Coccoloba. 
6. Triplarideae (usually dioecious) : Triplaris. 
[Placed in Curvembryae by Benth. -Hooker, in Polygoniflorae by 
Warming.] 
Floral diagrams (after Eichler). A , Rheum; B, Polygonum tataricum\ C. 
Rumex; D. Polygonum lapathifolium. Bracts and bracteoles are omitted, and in 
C and D the axis also. Glands in B shaded. The asterisks represent missing sta. 
Polygonales. The 13th cohort of Archichlamydeae (p. 127). 
Polygonatum (Tourn.) Adans. Liliaceae (vn). 25 sp. N. temp.; 3 in 
Brit. (Solomon’s seal). There is a sympodial fleshy rhizome, upon 
which the annual shoots leave curious seal-like marks when they die 
away. Infl. unilateral; flr. homogamous, bee-pollinated. 
Polygoniflorae (Warming). The 5th cohort of Choripetalae (p. 138). 
Polygonum (Tourn.) Linn. Polygonaceae (11. 4). 150 sp. universal, 
but esp. temp. (11 in Brit., knot-grass, bistort, &c.). In habit the 
genus varies much, though all are herbaceous. Some are xerophytes, 
some water plants (e.g. our common P. amphibiwii L., which may 
however be found almost as often on land where its leaves have not 
the stalks of the water form). The firs, are in spikes and panicles 
(the partial infl. is cymose). Firs, g , acyclic, usually with a coloured 
5 -leaved perianth and about 8 sta. Honey is secreted at the base of 
