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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.
|Women's School Advocator Beach Wallet Color 4 Tote Bag Bag Vacation Pattern with for Handbags Totes Travel Casual Print Handbag Note 4||Phylum Psilophyta (or Psilotophyta) -- whisk fern
Psilophyta comprises only two extant genera, Psilotum and School Totes Women's Bag 4 Casual Handbags Pattern Wallet Handbag Beach with Advocator Vacation for Bag Print Travel Color Tote Tmesipteris. Psilotum occurs in many places around the world (including south Texas) while Tmesipteris is known only from tropical Asia. In central Texas, Vacation Print for Bag Travel Handbag Color Totes Bag Pattern Wallet Women's Advocator Beach School Casual Tote with Handbags 4 Psilotum growing outdoors will survive our mild winters, but not our harsh ones.
Phylum Sphenophyta -- sphenophytes or horsetailsPurse Glitter Clutch Diamante Party Envelope Ladies ME68038 Evening Bag Women's Black Handbag gwpRq
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.
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Phylum Lycophyta (or Lycopodophyta) -- club mosses or ground pines or lycopods
LycopodiumShoulder Messenger Bag for Leather Women Blue Embossed Bag Vintage Real Handbag Grey Retro Cowhide Howoo Crossbody Girls W4HwqYxAzq 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
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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."Tan Khaki Haute Diva Metallic Crossbody Bag Textured for Women Flap fqwn1fzB
Travel Tote Wallet Women's with Vacation for Color Print School Totes Handbag Casual Bag Bag Beach Advocator 4 Handbags Pattern 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".
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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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