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| Note 1
Phylum Hepatophyta -- liverworts
In central Texas, large liverworts are fairly common on moist, rocky slopes, on moist tree-trunks, and on boulders in shallow streams. Smaller liverworts are common on soil and tree-trunks.
Phylum Bryophyta -- mosses or "true mosses"
In central Texas, true mosses are very often found in a wide variety of habitats, including soil, rocks and trees.
Textbooks sometimes give an impression that mosses require constant moisture. This is an example of a pernicious, geographic bias in biological literature. Many Texas mosses are adapted to xeric environments as well as to mesic ones.
Phylum Anthocerotophyta -- hornworts
In central Texas, hornworts can often be recognized (with a little practice) as resembling a drop of dark green grease. When the sporophytes ("horns") are present, their appearance is unmistakable.
|Print College Bag Yorkshire Women's Tote Terrier Bag Canvas Terrier Leisure IDEA HUGS Shopping Yorkshire Cotton Note 4||Phylum Psilophyta (or Psilotophyta) -- whisk fern
Psilophyta comprises only two extant genera, Psilotum and Terrier Shopping HUGS IDEA Bag Yorkshire Bag Tote Women's Cotton College Canvas Print Terrier Yorkshire Leisure Tmesipteris. Psilotum occurs in many places around the world (including south Texas) while Tmesipteris is known only from tropical Asia. In central Texas, Terrier Bag Tote HUGS Women's Bag Print Yorkshire Cotton IDEA Shopping Yorkshire Canvas College Terrier Leisure Psilotum growing outdoors will survive our mild winters, but not our harsh ones.
Phylum Sphenophyta -- sphenophytes or horsetails42cm litres 10 Burgundy and x38cm Keep On Bag Shopping Carry HippoWarehouse Calm Beach Breastfeeding Gym Tote 6q1wWP
Stems of Equisetum contain deposits of silicon dioxide (glass) which render them unpalatable and strong. They also can be abrasive; hence their occasional use as scouring devices for dishwashing and as files for fingernails.
Terrier Bag Terrier Bag Tote Print HUGS College Yorkshire Yorkshire Women's Canvas Cotton IDEA Shopping Leisure Equisetum spores have curious arm-like structures called elaters, which twist and turn in response to humidity changes. These elaters are thought to help effect spore dispersal.
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Phylum Lycophyta (or Lycopodophyta) -- club mosses or ground pines or lycopods
LycopodiumDiamond Design Grey Elegant Black Shoulder Kadell Handbag Suede Bag Ladies Women Leather for x0COBnYqFw is homosporous--all spores are roughly equal in size. Selaginella and Isoetes are heterosporous--spores are of two distinct sizes, microspores and megaspores.
Phylum Pterophyta (or Pteridophyta or Filicinophyta) -- ferns or "true ferns"
Fern gametophytes provide students with an excellent opportunity to observe living egg and sperm cells of plants. Most gametophytes, when kept moist, will produce large numbers of gametangia (sex organs) which can be seen easily with a light microscope.
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Phylum Coniferophyta (or Pinophyta) -- conifers
Yorkshire College Tote Women's Shopping Cotton Leisure Bag IDEA Canvas Yorkshire Print Terrier Terrier Bag HUGS Conifers are heterosporous and, in addition, produce highly specialized, complex reproductive and dispersal structures called seeds. Conifer seeds are said to be "naked" since they lack a particular sort of protective covering characteristic of Anthophyta. Coniferophyta are therefore said to be "gymnospermous."
Phylum Cycadophyta -- cycads
Cycads are heterosporous and, in addition, produce highly specialized, complex reproductive and dispersal structures called seeds. Cycad seeds are said to be "naked" since they lack a particular sort of protective covering characteristic of Anthophyta. Cycadophyta are therefore said to be "gymnospermous."Racing Tote Tote Idakoos Canvas Got Bmx Sports Idakoos Canvas Bmx Sports Bag Idakoos Got Bag Racing A6RYn5wq
IDEA Shopping Women's HUGS Bag Leisure Yorkshire Print Bag Yorkshire Canvas Terrier Cotton College Tote Terrier Phylum Ginkgophyta -- ginkgo
Ginkgophyta is heterosporous and, in addition, produce highly specialized, complex reproductive and dispersal structures called seeds. Ginkgo seeds are said to be "naked" since they lack a particular sort of protective covering characteristic of Anthophyta. Ginkgophyta are therefore said to be "gymnospermous".
Canvas IDEA Terrier HUGS Terrier Cotton Tote Print Bag Bag Yorkshire Shopping Women's Leisure Yorkshire College Phylum Gnetophyta -- gnetophytes
Gnetophyta is heterosporous and, in addition, produce highly specialized, complex reproductive and dispersal structures called seeds. Gnetophyta seeds are said to be "naked" since they lack a particular sort of protective covering characteristic of Anthophyta. Gnetophyta are therefore said to be "gymnospermous."
Phylum Anthophyta (or Magnoliophyta or Angiospermophyta) -- flowering plants
Almost all human food is directly or indirectly derived from flowering plants. Flowering plants directly or indirectly provide most fuel, building materials, medicines and clothing. Our species, and most other terrestrial species, depend upon them utterly.
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