S2 CLASS XIII. ORDER XIII. 



Order XIII. Polygyria. 



Hydrastis. Calyx : corol o-petalled : 

 berry composed of 1 -seeded acines. 26.61 — cana- 

 densiS) (orange-root) leaves binate, palmate, peti- 

 oled. 21 . w. 



Clematis. Calyx : petals, 3, 4, 5, or 6 : seeds 

 compressed : styles permanent, becoming long 

 tails. (Some species are dioecious.) 26. 61 — virgin* 

 anuf (virgin's bower) dioecious, climbing, leaves 

 lernate with climbing petioles. %. w. 



Thalictrum. Calyx : petals 4 or 5 : fila- 

 ments very long : seeds without tails, '^striate, ter- 

 ete. (Some species are dioecious) 26. 61— c?/ofcw?n, 

 (meadow rue) dioecious, leaves heart-roundish with 

 obtuse lobes, peduncles axillary, shorter than 

 leaves. %• r. w. — cornuti, dioecious, leafets 3 -cleft, 

 panicles terminal. 2/. -w.^^fioiygamum^ hairy and 

 slender, leaves more than decompound, panicle ter- 

 minal. 2/. W. 



Helleborus. Calyx : petals 5 or many : nec- 

 taries tubular, 2-lipped : capsules 5 or 6, erectisb, 

 compressed, many-seeded. 26. 61 — trifoliatus^ 

 (gold thread) scape 1 -flowered, leaves ternate with 

 roundish crenate leafets. %. w. Root creeping 

 and golden yellow. 



Caltka. Calyx : petals 5 to 9 : capsules nu- 

 merous, many seeded : nectaries 0; (styles variable 

 in number.) 26. 61 — palustris, (American cowslip) 

 leaves heart-reniform, crenate. 7^. y. 



Anemone. Calyx : petals 5 to 9 : seeds nu- 

 merous, naked. 26. 61 — nemorosa, (wind-flower) 

 stem simple, 1-flowered, 3-leaved with gashed leaf- 

 ets. If. T-vf.'-'-thalictroidest (rue-anemone) stem 

 simple, stem-leaves 6 whorled petioled, root-leaves 

 long-peduncled. %. w. — virginiaria, stem forked, 

 many-flowered, petals acute. 2/. g-y. 



