The rhizome in Pteridium is subterranean with numerous dichotomous forkings and is capable of indefinite growth. Pteridium aquilinum, the common bracken fern, is the first to invade cultivated fields and when once established is difficult to eradicate. This is one of the ferns able to compete with flowering plants as a weed. It is mainly […]
Diagram of Pteridium| Pteridophytes | Archegoniate Plants | Botany
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Reproduction in Gnetum (With Diagram) | Gymnosperms | Botany
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In this article we will discuss about the process of reproduction in gnetum with the help of diagrams. Gnetum is dioecious, the fructifications are axillary (Fig. 18.1 A). The cones are lax to compact strobili. Microsporangiate fructification (Fig. 18.2A) has short internodes and number of reduced and modified bracts which form a complete cup or […]
Morphology of Gnetum (With Diagram) | Gymnosperms | Botany
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In this article we will discuss about the morphology of gnetum with the help of a suitable diagram. In its morphology, Gnetum (Fig. 18.1 A) is closer in similarity to an angiosperm (dicot) than a gymnosperm. G. ula is a woody climber. It exhibits two types of branches, of limited growth (short shoots) and unlimited […]