A University Text-Book of Botany
A University Text-Book of Botany
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In our eReader you can find the full English version of the book. Read A University Text-Book of Botany Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A University Text-Book of Botany
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Mesembryanthemum).
The more specialized types, like Dianthus, Silene, Portulaca^ etc., 3?C.
Fig. 406. — Aaarum Canadense.
have showy petals, and the calyx is often tubular. In Mesembry- anthemum (Fig. 409) many of the numerous stamens are transformed into petaloid staminodia.
In the higher Choripetalae the calyx is usually composed of united sepals, and the parts of the flower are constant in number. The sta- mens, however (Myrtaceas, Rosaceas), may be more numerous, and sometimes the carpels a...lso, suggesting an afl&nity with the Ranales.
With the exception of some .of the Rosiflorae, also, the carpels are almost always united into a compound pistil.
Among the less specialized forms the flowers are radially sym- Digitized by Google 424 BOTANY metrical (actinomorphic), — e.g. Rosa, Papaver, Oxalis, — but many are markedly zygomorphic, as Viola, Tropseolum, Leguminosse. All degrees of cohesion of the ovary with the floral axis are found, even in the same order. Thus in the Kosales, the Crassulaceae have all the parts of the flower quite separate; in Pyrus, the carpels are more or less completely united with the floral axis, and in Kibes there is a true inferior ovary.
What to read after A University Text-Book of Botany?
You can find similar books in the "Read Also" column, or choose other free books by Campbell Douglas Houghton to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Mesembryanthemum).
The more specialized types, like Dianthus, Silene, Portulaca^ etc., 3?C.
Fig. 406. — Aaarum Canadense.
have showy petals, and the calyx is often tubular. In Mesembry- anthemum (Fig. 409) many of the numerous stamens are transformed into petaloid staminodia.
In the higher Choripetalae the calyx is usually composed of united sepals, and the parts of the flower are constant in number. The sta- mens, however (Myrtaceas, Rosaceas), may be more numerous, and sometimes the carpels a...lso, suggesting an afl&nity with the Ranales.
With the exception of some .of the Rosiflorae, also, the carpels are almost always united into a compound pistil.
Among the less specialized forms the flowers are radially sym- Digitized by Google 424 BOTANY metrical (actinomorphic), — e.g. Rosa, Papaver, Oxalis, — but many are markedly zygomorphic, as Viola, Tropseolum, Leguminosse. All degrees of cohesion of the ovary with the floral axis are found, even in the same order. Thus in the Kosales, the Crassulaceae have all the parts of the flower quite separate; in Pyrus, the carpels are more or less completely united with the floral axis, and in Kibes there is a true inferior ovary.
What to read after A University Text-Book of Botany?
You can find similar books in the "Read Also" column, or choose other free books by Campbell Douglas Houghton to read onlineMoreLess
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