Polygonum.] ^ cxix. PoLyGonacex. (J. D. Hooker.) 4T 
92. P. sagittatum, Linn.; Meissn. in DC. Prodr. xiv. 1. 132; gla- 
brous, stem suberect or prostrate angles petioles and midrib beneath covered 
more or less with recurved prickles, leaves petioled 1-2 in. linear-oblong 
obtuse or acute base sagittate, margins smooth, stipules very short glabrous, 
eads few small, involucral leaf 0, peduncles slender distantly muricate or 
smooth, bracts oblong obtuse glabrous, nut 3-gonous. P. muricatum, Herb. 
Griff. Kew Distrib. 4195. P. Sieboldii, Meissn. l. c. 183. 
WESTERN HIMALAYA, Falconer ; Kulu and Kumaon, alt. 7-8000 ft., Edgeworth ; 
. Lohoo Ghat, Thomson, East BENGAL, Grifith. KHAsIA MTs., in marshes at My- 
dto. alt. 5000 ft., J. D. H. 4 T. T.—DiISTRIB. Siberia, China, Japan, Eastern N. 
merica. - 
Very similar to slender form of P. strigosum, but the leaves are shorter, more 
glaucous beneath, not truncate or cordate below, but with two long deflexed or 
incurved obtuse or acute auricles, and their margins are quite smooth. 
59. P. strigosum, Br. Prodr. 420; stem 2-4 ft. suberect angles 
petioles and nerves of leaf beneath more or less covered with recurved 
rickles, leaves shortly petioled linear or linear-oblong acuminate or acute 
ase truncate or shortly cordate, margin retrorsely prickly, racemes anicled 
oblong or subglobose, peduncles scabrid prickly or glandular-hispid, bracts 
ovate or oblong ciliate and strigose, nut globosely 3-gonous included in the 
penanth. Meissn. in DC. Prodr. xiv. 134. P. horridum, Rozb, Cat. 29, 
and FV. Ind. ii. 291; Meissn. in Wall. Pl. As. Rar, iii. 58, and in DC. 
l. c. 133. P. muricatum, Wall. Cat. 1697 (not of Meissn.), excl. var. gla- 
brata; Miquel Fl. Ind. Bat. i. 1011. P. sagittatum, Don Prodr. 73 (not of 
Linn.) P. sagittatum B. indicum, Meissn. Monog. Polyg. 65. P. his- 
pidulum, Blume Bijd. 535. P. auriculatum, Herb. Ind. Or. H. f. 4 T. 
TnoPICAL HIMALAYA from Kulu to Bhotan, and the KrasIA Mrs., ascending to 
t., in watery places ; and southward to the NILGHIRI MTS., CHITTAGONG and 
PENANG, CEYLON; alt. 5-6000 ft. (C. P. 3348).—DrsTRI2. Ava, Malay Archipelago, 
ina, 
, Stem 1-8 ft., often rather stout, very variable in amount of prickles, Leaves 1-5in., 
Tigid, glabrous or pubescent beneath, sometimes scabrid above, margin with rigid 
minute recurved prickles, midrib usually prickly ; petiole 1-3 in. or 0; stipules 1 In, - 
ciliate, glabrous or hairy, base with usually a pectinate ring of reversed prickles. 
Peduneles slender ; racemes 3-4 in., densely many- or few-fid.; flowers pink. Perianth- 
lobes obtuse, Stamens 6-8, Styles slender, connate below. Nut black, opaque, 
punctulate.—Meissner describes the nuts as sometimes biconvex ; I find all the N orthern 
?ndian specimens to be trigynous, all the Peninsular digynous, which favours the view 
that this does not differ from P. pedunculare. Bentham indeed (Fl. Austral. v. 268) 
unites with this p. pedunculare, P. glabratum, and P. muricatum. „For the first 
and second there is something to be said, but P, muricatum is an entirely different 
Species, The American P, Meissnerianum differs from P. strigosum chiefly in the 
Prickles not being recurved. 
54. P. pretermissum, Hook. f; small, glabrous, stem 6-8 in. 
ascending subsimple nearly or quite aimed leaves shortly petioled linear 
obtuse base sagittate with obtuse lobes, stipules glabrous eciliate with a few 
recurved bristles at the base, flowers very few and distant in ain or 
Simple glabrous axillary racemes, bracts erect oblong glabrous or subciliate, 
nut globosely 3-gonous included in the perianth. P. strigosum, Thwaites 
Enum, in part; Benth. Fl. Austral. v. 268, in part. P. muricatum, var. 
slabrata, Wall, Cat. 1697/3. P. muricatum, Herb. Ind. Or. H. f. § T. 
Singer, Wallich. KnasrA MTs., in watery places, alt. 4-5500 ft., J. D. H. 4 
» Clarke. CEYLON, alt. 6-7000 ft., Walker (C. P. 2250).—Disrar. Tasmania, 
Stem 4-18 in., creeping and rooting at the base, quite smooth except rarely a few 
