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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    regular or irregular, its divisions edged with a nerve. Stamens 5, syngenesious. Ovary one. Style one, sheathed by the tube of the anthers. Stigma simple or bifid. Fruit an achenium. Seed erect, without albumen. Embryo straight. Radicle oppo- site the hilum. Stems (in the British genera) herbaceous. Leaves opposite or alternate. Flowers capitate, inserted into a broad receptacle and surrounded by an involucre. Div. I. Cichoracule. All the florets ligulale and perfect. 1. TRAGOPOGON. Involucre simple, of many leaves. Receptacle naked. Pappus feathery, stipitate. Pericarps longitudinally striated. 1. Tr. pratensis, involucre about as long as the cor., leaves un- divided glabrous acuminated channelled, peduncles cylindrical. p. 226.—Pastures. 2. Tr. porrifolius, involucre much longer than the cor., leaves undivided straight, peduncle thickened upwards, p. 226.— Meadows, rare, 2. P1CRIS. Col. double, the inner segments equal, the outer lax. Receptacle naked. Pappus feathery. Pericarps transversely striated. {Picris and Helminlhia, Decand.) 1. P. hieracioides, exterior scales of the involucre short lax, leaves very rough lanceolate toothed, stem scabrous, pappus sessile. p. 226.—Road-sides. 3. SONCHUS. Involucre imbricated, swelling at the base. Receptacle naked. Pappus simple, sessile. 1. S. cceruleus, peduncles and involucre hispid racemose, leaves sublyrate, terminal lobe deltoid very large, S?)i.p.226.—Alps. 2. S. arvensis, peduncles and involucre hispid subumbellate, leaves runcinate dentalo-ciliate cordate at the base. p. 226.—Corn- fields. 3. S. oleracciis, peduncles subtomentose umbellate, involucre glabrous, leaves runcinate dentato-ciliatc amplcxicaul at the base. p. 22'/.—Waste places. 4. LACTUCA. Involucre imbricated, cylindrical; its scales with a membranous margin. Receptacle naked. Pappus simple, stipitate. 1. J,, virosa, leaves oblong toothed horizontal, their keel prickly, their apex obtuse, p. 227.—Banks, rare.