284 
66. POLTGOKACE^. 
2. Oxtr'ia HUl. Mountain Son-el/ 
1. 0. renifdrmis (Hook.)-— -E"- 910.— St. 8—10 in. high, 
usually leafless. L. radical, renifomi, slightly notched at the 
end ; veins radiating from the insertion of the long footstalk. 
Pedicels thickening upwards, in a spikelike raceme. Per- 
manent pet. not enlarged. — Lofty moimtains. P. VII. \TII. 
E. S. I. 
3. Poltg'onuji Linn. 
* Rhizomatous. Stem simple. Ocrece truncate. Nut tri- 
quetrous. Stam. 8. Styles 3. Bistorta. 
1. P. Bistor'ta (L.) ; spile dense, I. ovate suhcordate, root-1. 
with winged footstalks, faces of nut ovate smooth. — E. B. 509. — 
St. 1 — 15 foot high. Ehizonie large. Fl. flesh-coloured. — Moist 
meadows. P. YI. and X. Snakeweed. E. S. I. 
2. P. vivip 'arum (L.) ; s^nJie lax bulbiferous bearing fl. on its 
upper part, I. linear-lanceolate with revolute margins, lower I. 
elliptic with wingless footstalks, faces of nut ovate-lanceolate 
smooth and shining. — K B. 669. — Height 4 — 8 in. Fl. on the 
lower part of the slender spilie replaced by small red bulbs. 
Fl. white, sometimes veiy few in number. — Mountain pastures. 
P. VI. VII. E. S. I. 
** Ocreee truncate. Root Jibrous. Nut compressed or subtri- 
quetrom. Stam. 4 — 8. Styles 2 — 3. Fl. spiked, rarely 
capitate. — Fl. jjurple or white. L. without or with a central 
dark spot. Persicaria. 
t Creeping. Perennial. Anthers protruded. 
3. P. amphib'ium (L.) ; spike dense ovfite-cylindrical, 1. stalked 
ovate-oblong (floating) or oblong-lanceolate or narrow-lanceolate 
rough at the margins, ocrese membranous close, nut compressed 
smooth shining, stam. 5. — E. B. 436. — St. long when floating. 
Sjnkes generally solitary and terminal. Fl. rose-coloured. Very 
variable in the form of its leaves according to its habitation. — 
Floating or gi-owiug upon mud or on boggy gTOund. P. VII. — 
IX. E. S. I. 
tt Root fibrous. Annual. Anthers included. 
4. P. Iap)athif6lium (L.) ; spikes oblong cylindrical dense, 1.. 
oblong-lanceolate or ovate attenuate at both ends glandular 
beneath, ocrece close not fringed the upper oms shortly fringed, 
peduncles and perianth rough with glamls, nut compressed its faces 
romidish acuminate conca^•e smooth shining scarcely covered 
by the perianth, styles distinct at length divergent and reflexed. 
— E. B. 1382.— Height 1—2 ft. St. sometimes spotted, glan- 
