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Plate 55] POLYGONUM 147<br />
Polygonum humile, Meissn. Low Polygonurn.<br />
A small, sparsely glandular- hairy annual. Stem 4-6 in. high,<br />
filiform, erect or widely branched from the base. Leaves ? in.<br />
long, almost stalkless, egg-shaped or rhombic-egg-shaped,<br />
very uniform, sometimes narrowed into a short broad stalk.<br />
Stipules short, tubular with a very oblique mouth. Flowerheads<br />
i in. diameter, long-stalked, without an involucral leaf.<br />
Bracts very small, flat, longer than the flowers, egg-lanceshaped,<br />
sharp-pointed. Perianth 4-5-lobed, greenish ;<br />
tube<br />
closely investing but not cohering with the nut, glandless ;<br />
lobes very short, rounded. Stamens 5-6. Styles '2-3, filiform,<br />
united below. Nut black, coarsely dotted.<br />
.<br />
Locality Tosh Maidan .<br />
Distribution. Temperate and alpine Himalaya, from<br />
Kashmir to Sikkim, up to 11,000 ft.<br />
Polygonum Hydropiper, Linn. Water-pepper.<br />
(From hydor, water, and piper, pepper.)<br />
A rather robust hairless annual. Stems much-branched,<br />
12-18 in. high, glandular, swollen at the joints, prostrate,<br />
rooting at the lower nodes. Leaves short-stalked, rarely more<br />
than 3 in. long, lance-shaped or oblong-lance-shaped, usually<br />
covered with impressed glands, hairless or with the midrib rough<br />
below. Stipules about J- in. long, tubular, hairless or sparsely<br />
hairy with the hairs sunk in the tissue, cilia short or absent.<br />
Racemes filiform, drooping, interrupted, 2-3 in. long. Bracts<br />
tubular, shortly fringed. Flowers pink or red. Perianth<br />
5-parted, glandular. Stamens usually 6, Styles 2 or 3,<br />
free nearly to the base. Nuts finely dotted, of the 2-styled<br />
flowers round and flattened, of the 3-styled ones 3-angled.<br />
Flowers. July to September.<br />
Locality. -Up to 7,000 ft.<br />
Distribution. N.W. Himalaya, to Bengal and Assam, Java,<br />
Australia, N. Africa, Europe.<br />
Polygonum islandicum, Hook. f. Island Polygonum.<br />
A glabrous herb. Stems very slender, fleshy, forming tufts,<br />
1-6 in. high, with matted roots. Leaves s-i in. long, stalked,<br />
inversely egg-shaped, blunt, often opposite. Stipules very<br />
small, 2-partite. Flowers 2-sexual or female, very minute,<br />
in terminal or axillary clusters or heads. Bracts not tubular
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