Flora Scotica, or A description of Scottish plants : arranged both according to the artificial and natural methods ; in two parts / by William Jackson Hooker.

  • Hooker, William Jackson, Sir, 1785-1865.
Date:
1821
Catalogue details

Licence: Public Domain Mark

Credit: Flora Scotica, or A description of Scottish plants : arranged both according to the artificial and natural methods ; in two parts / by William Jackson Hooker. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    HAn. Ditches and ponds, not very common, Light/. In the Clyde, Ure. Fl. Aug. %. ?Not being acquainted with this, as really distinct from the preceding, I quote Smith's description. I should doubt its being a good species. 11L P. pusillum (small Pond-weed), leaves linear opposite and alternate distinct spreading from the base, stem cylindrical (Sm.). Light}', p. 124. E. B. t. 215. i Hab. Ditches and stagnant waters, Light/. Common, Hopk. Fl. July. 11. ] Having no authentic specimens of this species in my possession, I can add nothing from my own observation to the above charac- ter from Smith. : 12. P. pectinatum (fennel-leaved Pond-weed), leaves distichous setaceous alternate sheathing, stipules scarcely any, spike of flowers interrupted. Lightf.p. 123; andp. 124(P. rnarinum). E. B. t. 323. Hab. Rivers, lakes and salt-water ditches. Lake of Rescalin, near Forfar, D. Don. River Tweed, near Kelso, Maugh. This species, from the leaves being rather closely set and regularly distichous, has, when growing, a remarkably pectinated appear- ance. Sheaths of the leaves long. The spike is interrupted, and as well as the general habit not unlike Ruppia maritima. 15. RUPPIA. 1. R. mar'Uima (Sea Ruppia). Light/, p. 124. E. B. t. 136. Hab. Stagnant waters by the sea-side, not uncommon, as at Glen- Elg, Inverness-shire, Light/. Salt-water pools at Guillon Links, Edinb., Maugh. Aberlady Bay, Mr. Arnott. FL July, Aug. 2/. Stems slender, filiform, flexuose, branched, leafy. Leaves linear- setaceous, sheaths an inch long, membranaceous, inflated. Spadix at first very short, included in the sheaths, with 2 naked green flow- ers one above the other, cm opposite sides. Anthers large, sessile, subquadrate, bursting horizontally. Germens resembling 4 minute tubercles in the centre between the anthers. After flowering, the spadix lengthens remarkably, five or six inches or more, and be- comes spirally twisted, so that it may extend or contract itself with the rising or falling of the waters; at the same time the germens swell, and rise upon footstalks (as the fruit ripens) of an inch in length. Drupes 4, ovate, acuminate.—For a more full account than I am able to insert here of this highly curious plant, and a full ana- lysis of the parts of fructification, I must refer to the New Series of the Flora Londinensis. 16. SAGINA. 1. S. procumbens (procumbent Pearl-ivort), perennial glabrous, stems procumbent, leaves shortly mucronate, petals much shorter than the cal., caps, longer than the cal. Light/', p, 125. E.B.I. 880. Hab. Sandy and gravelly soils, frequent. Fl. June, July. 11.