By James Cullen
Functional Plant id is a vital advisor to picking flowering plant households (wild or cultivated) within the northern hemisphere. information of plant constitution and terminology accompany sensible keys to spot 318 households into which flowering crops are divided. in particular designed for sensible use, the keys can simply be labored backwards for checking identifications. Containing descriptions of households and listings of the genera inside of, it is also a bit on additional identity to widely used and particular degrees. A successor to the author's bestselling The id of Flowering Plant households, this advisor is up-to-date, and keeps an analogous concise uncomplicated technique. Cullen skillfully leads the reader from restrictive disciplines of older taxonomy, into an period of accelerating numbers of plant households outlined by means of DNA research. Aimed basically at scholars of botany and horticulture, it is a ideal advent to plant identity for a person attracted to plant taxonomy.
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Extra resources for Practical plant identification : including a key to native and cultivated flowering plants in north temperate regions
Sample text
3d,e,g) or are borne on a basal placental cushion (oblique in Berberis) (see fig. 3f ). (vi) Apical. In this case the ovule (generally solitary) is attached to the apex of the single cell (or free or solitary carpel, see above), as in Scabiosa (see fig. 3i,j) or Anemone (see fig. 3k). Although it would be possible to describe the ovules in the cells of many septate ovaries as ‘apical’ or ‘basal’, the terms have not been Above-ground parts 31 used in this sense here. Instead, to avoid confusion, ‘pendulous’ or ‘ascending’ have been used, and are considered to be special cases of axile placentation.
Table 1 and the accompanying illustrations (figs. 5, 6 and 7) should make clear the proper usage of these terms. The terms may be difficult to use with unisexual flowers. If a pistillode (a sterile ovary) is present in a male flower it may be possible to decide whether the various whorls are hypogynous, perigynous or epigynous. If, however, no pistillode is present, much care must be taken and a female flower must be sought. g. Betula) then it is not possible to use these terms at all, and such ovaries are described as naked.
G. Ranunculus). g. all Compositae). Caryopsis Essentially an achene in which the pericarp and the seed coat (testa) have fused together, characteristic of the grass family (Gramineae). Capsule Formed from a pluricarpellate ovary, the capsule is dry, severalseeded, and dehisces by longitudinal (or rarely radial) splitting of 48 Examining the plant the pericarp, or by the formation of pores within the pericarp. It is the most common type of fruit. Lomentum The equivalent of a follicle, legume or capsule which breaks up into 1-seeded segments, which are themselves indehiscent.