NOTES ON FLORA OF GUIANAS

The three Guyana countries together have 64 genera that do not occur in Brazil. None represent an absent family in Brazil; for very detailed maps off all most important sites of botanic collections in Guyana, see Hoffman (Smithsonian Plant Collection, 2014); endemic genera marked in bold.

GUYANA (51) ‣ Brasenia (Cabombaceae), Chlorocardium (Lauraceae), Jasarum (Araceae), Chaubardiella, Sievekingia, Gomphihis, Eloyella, Oliveriana, Teuscheria (Orchidaceae), Potarophyton, Windsorina (Rapateaceae), Rhynchocladium (Cyperaceae, GBIF), Lutheria (Bromeliaceae), Phragmites (Poaceae), Maburea (Erythropalaceae), Whittonia (Peridiscaceae), Ceratostema (Ericaceae), Chorisepalum, Enicostema, Rogersonanthus (Gentianaceae), Didymochlamys, Duidania, Etericius, Erithalis, Maguireothamnus, Pteridocalix, Wittmackanthus, Merumea (Rubiaceae), Christopheria, Lampadaria, Pagothyra, Roogeton, Kohleria, Crantzia (Gesneriaceae), Condylidium, Quelchia (Asteraceae), Pseudanamomis (Myrtaceae), Maguireanthus, Ochthephilus (GBIF), Boyania, Phainatha, Tryssophytum, Pterogastra (Melastomataceae), Loxopterigyum (Anacardiaceae), Pakaraimaea (Cistaceae), Guaiacum (Zygophyllaceae), Dystovomita, Thysanostemon (Clusiaceae, GBIF), Pibiria (Passifloraceae, SEE), Neosprucea (Salicaceae), Senefelderopsis (Euphorbiaceae).

SURINAME (16) ‣ Chlorocardium (Lauraceae), Teuscheria, Chamelophyton, Degranvillea, Chaubardiella, Sievekingia (Orchidaceae), Lutheria (Bromeliaceae), Phragmites (Poaceae), Buxus (Buxaceae, GBIF), Chorisepalum (Gentianaceae), Kohleria, Lembocarpus, Pagothyra (Gesneriaceae), Megaskepasma (Acanthaceae), Loxopterigyum (Anacardiaceae), Guaiacum (Zygophyllaceae).

FRENCH GUIANA (19) ‣ Brasenia (Cabombacae), Asterogyne (Arecaceae), Chamelophyton, Degranvillea, Spiranthes, Chauberadiella, Sievekingia (Orchidaceae), Lutheria (Bromeliaceae), Phragmites (Poaceae), Garciemoriana (Apocynaceae), Christopheria, Cremersia, Pagothyra, Kohleria, Lembocarpus (Gesneriaceae), Russelia (Plantaginaceae), Loxopterigyum (Anacardiaceae), Amyris (Rutaceae), Hekkingia (Violaceae).

DISTRIBUTION OF SOME GUIANIAN GENERA ABSENTS IN BRAZIL

GUYANA/SURINAME (3) ‣ Chlorocardium (Lauraceae), Chorisepalum (Gentianaceae), Guaiacum (Zygophyllaceae).

GUYANA/FRENCH GUIANA (2) ‣ Brasenia (Cabombaceae), Christopheria (Gesneriaceae).

SURINAME/FRENCH GUIANA (3) ‣ Chamelophyton, Degranvillea (Orchidaceae), Lembocarpus (Gesneriaceae).

GU/SR/FG (7) ‣ Chauberadiella, Sievekingia (Orchidaceae), Lutheria (Bromeliaceae), Phragmites (Poaceae), Kohleria, Pagothyra (Gesneriaceae), Loxopterygium (Anacardiaceae).

NOT SO FAR

Below are the most distant points from Brazil in the territories of Guyana, Paraguay and Uruguay. None of them exceeds 500 km. In the Guianas, the furthest point is in the north of Suriname and is no more than 382 km from Brazil at the height of N Pará. In Paraguay, the furthest point is in the westermost point of country and is no more than 477 km from Brazil at the height of Mato Grosso do Sul. In Uruguay, the furthest point is in southern extreme of country and is no more than 412 km from Brazil at a point in SE Rio Grande do Sul state.