Specimen # 2 Platydictya confervoides

                           
                                         Fig.1. Platydictya confervoides








Name: Platydictya confervoides

Family: Plagiotheciaceae

Collection Date: 14/09/2001

Habitat:  grow on limestone, in a woody area

Location: South Chargin Reservation

Description:  "plants small, dark green with creeping stems and erect-ascending branches, on moist, shaded limestone, southeastern Canada south to the Great Lakes and Arkansas." (Conrad and Redfearn, 1979)

Collector: Getachew Hatsey 

Key Used: Conard, H.S. and P.L. Redfearn, Jr. 1979. How to Know the Mosses and Liverworts 2nd Edition, McGraw-Hill, Boston, Mass.

Keying Steps:

Introduction Key pg. 19

isodiametric...rhizoids multicellular..sporophyte long lived..........................2

2b. Plants not as above...................3

3b. plants not as above....................(p.28) Subclass 3. BRYDAE.

1b. leaves with a midrib (Costa).........2

2b.green plants, if empty cells occur they are not in 2 or 3 layers or they occur at the base, apex, margin of leaf...........3

3b. Leaves inserted in three or more rows though plants sometimes strongly flattened thus appearing in two rows......7

7b. Plants with peristome of more than 4 teeth or the peristome absent; gemmae when present at the tips of sterile stems not arranged in a cup................................8

8b. Leaves well developed and persistent..........9

9b. Capsules and leaves not as above..............10

10b. plants with distinct stem, if capsule present with operculum..............................17

17b. plants not minute, growing on rocks or soils..........20

20b. leaves without such outgrowth; sometimes with deciduous gemmae..............................28

28b. plants not having the above combination of characters; growing on various substrate but not restricted to rich organic soil, bones, or other organic matter...............33

33b. stems creeping or ascending, usually extensive branched, in interwoven mats: archegonia, antheridia and sporophytes lateral or at the ends of branches..............................139

139b. leaves smooth; more or less glossy....................174

174b. paraphyllia or multicellular propagula few or none, usually not seen, if numerous, then plants complanate.........182

182b. Costa single and strong to short and/or double to absent................................183

183b. Costa single, reaching the middle of the leaf or beyond to lacking, or short and or/or double................184

184b. Costa lacking, or lacking short and / or double.............................230

230b. plants terrestrial; costa short and double...............................231

231a. Median leaf cells short, 2-5:1....................................................232

232b. Cell walls thin, equally thick all around..................................234

234a. Leaves entire.............................237

237b Cells smaller, 7-8micro wide; alar cells small and numerous............................................238

238a. leaves minute, to 0.6mm long.................................(p.183) Platydictya

1a. plants growing on limestone rocks.........Platydictya confervoides.

"plants small, dark green with creeping stems and erect-ascending branches, on moist, shaded limestone, southeastern Canada south to the Great Lakes and Arkansas." (Conrad and Redfearn, 1979)

Links:

http://data.gbif.org/species/browse/resource/594/taxon/5289848/

http://www.theplantlist.org/tpl/record/tro-35182606


http://books.google.com/books?id=fCcP6lFS4l8C&pg=PA1142&lpg=PA1142&dq=Platydictya+confervoides&source=bl&ots=bQUirj3o7a&sig=uDFFtDPOei1kP-1Lkb6yGexkmwA&hl=en&ei=jCSVTpagK4Xo0QH6gtSpBw&sa=X&oi=book_result&ct=result&resnum=5&sqi=2&ved=0CDUQ6AEwBA#v=onepage&q=Platydictya%20confervoides&f=false


http://plants.usda.gov/java/profile?symbol=PLCO14