WebThere are two types of steles 1. Protostele 2. Siphonostele 1. Protostele: In protostele phloem surrounds xylem. The type includes Haplostele, Actinostele, Plectostele, and Mixed protostele. (i) Haplostele: Xylem surrounded by phloem is … WebThe main plant body of pteridophytes is a diploid (2n) sporophyte which is well-differentiated into roots, stems and leaves. Pteridophytes also exist as an independent thalloid (undifferentiated plant body) known as prothallus that bears the sex organs. This plant body represents the gametophyte generation of their life cycle. Stem
Pteridophytes Live Plant Collections - Duke University
WebEquisetopsida, (division Pteridophyta), class of primitive spore-bearing vascular plants. Most members of the group are extinct and known only from their fossilized remains. The sole living genus, Equisetum, order Equisetales, is made up of 15 species of very ancient herbaceous plants, the horsetails and scouring rushes. Extinct members of the division, … WebBrowse 54,922 pteridophyta photos and images available, or start a new search to explore more photos and images. jungle leaves background - pteridophyta stock pictures, royalty … healthchem pharmacy balham
Pteridophytina Encyclopedia.com
WebAdiantum capillus-veneris, the Southern maidenhair fern, black maidenhair fern, maidenhair fern and venus hair fern, is a species of ferns in the genus Adiantum and the family … WebApr 21, 2024 · Microscopic images of Pteridophyta (9 C, 57 F) Pteridophyta botanical illustrations (29 C, 45 F) Pteridophyta diagrams (1 C, 60 F)- ... Media in category "Pteridophyta" The following 14 files are in this category, out of 14 total. Fern Frenzy (46282473081).jpg. Fern lake (37387799900) ... WebA heterosporous life history occurs in some pteridophytes and in all seed plants. It is characterized by morphologically dissimilar spores produced from two types of sporangia: microspores, or male spores, and megaspores (macrospores), or female spores. In pteridophytes, megaspores are typically larger than microspores, but the opposite is true ... gomez and gomez statistics book pdf