. The Intellectual observer. ummer. We shall, therefore, pass on to tbenext group, those furnished with a nerve or costa, and whoseperianth is single. And here we have a slender, but veryabundant species—Jungermannia furcata, the forked Junger-mannia—which may be found on rocks, on heathy ground,about the roots of trees, or climbing their trunks, and some-times on low bushes. It has a linear frond, as will be seen bythe illustration, dichotomous, membranaceous, and costate, glabrous or smooth above,but beneath and on the mar-gin more or less hairy, of atender green hue, and thefronds so crowde
. The Intellectual observer. ummer. We shall, therefore, pass on to tbenext group, those furnished with a nerve or costa, and whoseperianth is single. And here we have a slender, but veryabundant species—Jungermannia furcata, the forked Junger-mannia—which may be found on rocks, on heathy ground,about the roots of trees, or climbing their trunks, and some-times on low bushes. It has a linear frond, as will be seen bythe illustration, dichotomous, membranaceous, and costate, glabrous or smooth above,but beneath and on the mar-gin more or less hairy, of atender green hue, and thefronds so crowded togetheras to give it the appearanceof a moss until it is closelyexamined, when its peculiarform sufficiently distinguishesit. The fruit arises from the Exampleof the Frondose Section of Juneer- •-i -i ,1 i ? i r> mannia. J. furcata. 1, natural size; 2, a midrib OU the Under Side 01portion magniUed, and bearing the capsule. ^ fvon([ . fce pcrj;llltll ig two-lobed, conduplicate, and has a ciliated margin. Several. The Parasites of the Cockroach. 837 varieties of this species liave been discovered, some witn largerand. some with smaller fronds. Variety elongata has a larger,more elongated, and straighter frond than ordinarily met is the variety maxima of Weber, and is chiefly fonnd onrocks in subalpine districts. Variety ceruginosa has a broaderfrond of a bine-green colour, and, except in the gemmiferousplant, the extremities, or apices, are dilated and very is the Jungermannia fruticulosa of English Botany, andthe Riccia fruticulosa of Dickson. It is found on trees in theWest of England, Scotland, and Ireland. The fructification of this and of Jungermannia jpubescens, anearly allied species, is, as Hooker remarks, very peculiar,anthers being found on the costa, on the under side of thefrond, inclosed in and attached to a costate scale, rolled uplike a ball; and gemma? are met with on the ceruginose variety,terminating narrow prolongations of the
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishe, booksubjectscience
