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P. A. Amerson

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32 collections found. 32 collections shown.

Details Collector Coll. # Family Genus Specific epithet Infra epithet Images Country Region Project Date Habit Habitat
Details P. A. Amerson 1842 Aspleniaceae Asplenium platyneuron 0 United ... Texas Ferns o... 26 Jun 1974
Details P. A. Amerson 696 Azollaceae Azolla caroliniana 1 United ... Texas Ferns o... 2 Sep 1971
Details P. A. Amerson 1112 Blechnaceae Woodwardia areolata 1 United ... Texas Ferns o... 30 Mar 1972
Details P. A. Amerson 1726 Blechnaceae Woodwardia virginica 1 United ... Texas Ferns o... 1 Nov 1973
Details P. A. Amerson 2034 Dennstaedtiaceae Pteridium aquilinum var. pseudocaudatum 0 United ... Texas Ferns o... 1 Apr 1974
Details P. A. Amerson 1144 Dryopteridaceae Athyrium filix-femina var. asplenioides 0 United ... Texas Ferns o... 26 Apr 1972
Details P. A. Amerson 989 Dryopteridaceae Athyrium filix-femina var. asplenoides 0 United ... Texas Ferns o... 3 Oct 1971
Details P. A. Amerson 986 Dryopteridaceae Onoclea sensibilis 0 United ... Texas Ferns o... 3 Oct 1971
Details P. A. Amerson 1850 Dryopteridaceae Polystichum acrostichoides 1 United ... Texas Ferns o... 14 Jun 1973
Details P. A. Amerson 988 Dryopteridaceae Polystichum acrostichoides 0 United ... Texas Ferns o... 3 Oct 1971
Details P. A. Amerson 1843 Dryopteridaceae Woodsia obtusa 1 United ... Texas Ferns o... 14 Jun 1973
Details P. A. Amerson 2378 Dryopteridaceae Woodsia obtusa 1 United ... Texas Ferns o... 1 Feb 1973
Details P. A. Amerson 1066 Dryopteridaceae Woodsia obtusa 0 United ... Texas Ferns o... 19 Mar 1972
Details P. A. Amerson 987 Dryopteridaceae Woodsia obtusa 0 United ... Texas Ferns o... 3 Oct 1971
Details P. A. Amerson 1266 Lycopodiaceae Lycopodium adpressum 1 United ... Texas Ferns o... 8 Aug 1972
Details P. A. Amerson 544 Lycopodiaceae Lycopodium carolinianum 1 United ... Texas Ferns o... 27 Jun 1971
Details P. A. Amerson 1443B Lygodiaceae Lygodium japonicum 0 United ... Texas Ferns o... 1 Sep 1973
Details P. A. Amerson 844 Ophioglossaceae Botrychium biternatum 1 United ... Texas Ferns o... 21 Sep 1971
Details P. A. Amerson 1863 Ophioglossaceae Botrychium virginianum 0 United ... Texas Ferns o... 14 Jun 1974
Details P. A. Amerson 314 Ophioglossaceae Botrychium virginianum 0 United ... Texas Ferns o... 17 Mar 1971
Details P. A. Amerson 1379 Ophioglossaceae Botrychium virginianum 0 United ... Texas Ferns o... 11 Jun 1973
Details P. A. Amerson 915 Ophioglossaceae Botrychium virginianum 0 United ... Texas Ferns o... 15 Jul 1971
Details P. A. Amerson 1173 Ophioglossaceae Botrychium virginianum 1 United ... Texas Ferns o... 7 May 1972
Details P. A. Amerson 2379 Ophioglossaceae Ophioglossum crotalophoroides 1 United ... Texas Ferns o... 1 Jan 1973
Details P. A. Amerson 272 Osmundaceae Osmunda regalis var. spectabilis 1 United ... Texas Ferns o... 24 Sep 1970
Details P. A. Amerson 2073 Parkeriaceae Ceratopteris thalictroides 1 United ... Texas Ferns o... 1 Jun 1974
Details P. A. Amerson 2080 Parkeriaceae Ceratopteris thalictroides 0 United ... Texas Ferns o... 10 Jun 1974
Details P. A. Amerson 2087 Parkeriaceae Ceratopteris thalictroides 1 United ... Texas Ferns o... 1 Jul 1974
Details P. A. Amerson 1956 Pteridaceae Adiantum capillus-veneris 0 United ... Texas Ferns o... 1 Mar 1974
Details P. A. Amerson 3 Pteridaceae Cheilanthes horridula 1 United ... Texas Ferns o... 27 Nov 1969
Details P. A. Amerson 2377 Pteridaceae Cheilanthes SpeciesIndet 0 United ... Texas Ferns o... 1 Jan 1973
Details P. A. Amerson 1111 Thelypteridaceae Thelypteris palustris var. pubescens 1 United ... Texas Ferns o... 30 Mar 1972
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