SIGMA OCTANTIS: AV: ANGIOSPERMS FROM AVALON

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BRYOPHYTA

Moss flora of Avalon is very poorly known. Heretofore, it contains 288 spp. and 6 varieties, distributed in 81 genera. Avalon includes 57 genera and 113 spp. uncollected in Brazil S.L. Mexico includes (325/)984 spp., Brazil S.U. at least (73:338/)1,009, and Colombia (65:261)/932.

MARCHANTYOPHYTA

Only (17/)32 spp. of this group was collected in Avalon, 11 absents in Brazil S.L. (includes seven genera uncollected in Brazil S.L.). Mexico includes (122/)592 spp., Brazil S.U. at least (39:139/)709, and Colombia (37:134/)703.

ANTHOCEROPHYTA

The unique hornwort collected in Avalon includes the highly evolutive singular Leiosporoceros dussii (Steph.) Hässel, known elsewhre only from Guatemala to Ecuador and Caribbean. By largest diverse countries in New World, (5:8/)19 spp. in Brazil S.U., 16 spp. in Mexico and (4:7/)15 spp. in Colombia.

LYCOPHYTA

The lycophytes, when broadly circumscribed, are a group of vascular plants that include the clubmosses. This group includes three orders, two in Avalon and Isoetales absent.

LYCOPODIALES ‣ Only six spp. occur in Avalon, 4 endemics, in Huperzia (3), Diphasium (1) and Lycopodium (2). Brazil S.U. leads absolutelly in all genera against Mexico and Colombia.

EXSICATES OF ALL LYCOPODIACEAE FROM AVALON

SELAGINELLALES ‣ (19/)770 spp. worldwide, 10 genera in New World, largest diversities in Brazil S.U. (8) and U.S.A. (7). (5/)31 spp. in Avalon Bryodesma (20), Lepidoselaginella (4), Pulviniella (3), Gymnogynum (3) and Toradaea (1, endemic), the two latters absents in Brazil S.U. Brazil S.U. leads in all genera against Mexico and Colombia.

EXSICATES OF ALL 31 SPECIES OF SELLAGINELACEAE FROM AVALON ISLAND (NOTE ONE DOUBLED AT GRAY RANGE)

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BASELLACEAE ‣ Genera/species 4/19 Distribution Tropical and subtropical regions of America (most species) and Africa, Madagascar; introduced into South Asia, New Guinea and islands of the Pacific. Habit Usually bisexual (rarely monoecious; some functionally unisexual), winding or climbing perennial herbs or lianas, slightly to distinctly fleshy. Stem bases and rhizome usually swollen and tuberous; roots sometimes tuberous. Perenial, sub-fleshy to succulent, herbaceous or occasionaly suffruticose vines, or sometimes erect plants. Small flowers with 2 petaloid sepals and 5 petals, subtended by 2 opposite bracteoles.

Tournonia Moq. Scandent succulent twining vines, producing new shoots to tickend stem base. Only one sp., T. hookeriana Moq., known paramo and semi-dry scrub to more humid forest at high altitudes from W Colombia to N Ecuador, disjunct in Avalon.

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Monday, March 20, 2023

AV: ANGIOSPERMS FROM AVALON