Chamaecrista rotundifolia (Pers.) Greene var. rotundifolia

• Region

  South America

• Country

  Brazil

• State/Province

  Maranhão

• County/Municipio

  Loreto Mun.

• Locality

  "Ilha de Balsas" region, between the Balsas & Parnaíba Rivers. Santa Bárbara due SSE of Lorêto, on shore of Rio Parnaíba. Property of Dona Luzia

• Elevation

  Alt. 140 m. (459 ft.)

• Coordinates

  -7.5, -45.05

• Distribution

  Map all specimens of this taxon

New York Botanical Garden
Revision of Cassia sect. Chamaecrista
of the Americas
Cassia rotundifolia Per s. var.
rotundifolia
H. S. Irwin & R. C. Bameby
FLORA OF BRAZIL
STATE OF MAHANHÀO
Cassia rotundifolia Pers.
Uetî H. S'. Irwin, 1966
Municipio de Loréto: “Ilha de Balsas” region, between the Rios
Balsas and Parnaiba. SANTA BARBARA, due SSE of Loreto, on
shore of Rio Piarnaiba. Flat rive? plain, less than 1 km. wide, several
meters above river level, covered with dense babagu palm grove.
Alt. 140 m. 7°30’S., 45°3’w. Properly of Dona Luzia.
Main vegetation types of region: (1) “chapada”, a semi-closed tree woodland (or
“cerrad&o”) on flat tops & steep sides of plateaus, a» Bftoep hilly land, and on
some areas of rolling or flat dry land; (2) “tabuleiro”, a semi-closed woodland,
or “cerradáo”, of different physiognomy & species composition, on tops of hilly
or gently rolling land; (3) “mata”, a closed tropical forest of many tree species,
usually with palms, in flat stream valleys and in or alongside of brook ravines &
courses; (4) “caatinga”, a semi-open forest of few forest tree spécies on low
moist flat land and in narrow valleys between “tabuleiro”-covered hills; (5) “var-
jáo”, low moist flat land with scattered forest trees of one or a few species;
(6) “cocal”, thick groves of babagu palm on flat river plain of Bio Parnaiba and
some of its tributary streams.AlÁlUJvegetatlon types completely deciduous during
dry season. All brooks intermittent. Annual ground fires and cattle grazing in
all areas. Part of “tabuleiro” cut over, forming treeless grassy areas; most
“mata” and much “caatinga” & “varj&o” cultivated or abandoned, forming dense
secondary vegetation of low trees & tall shrubs (“capoeira”); some areas of
“chapada” with dense secondary vegetation (“carrasco”). Upland soils grayish,
tan, or light reddish brown silt or silty clay, very stony on slopes; lowland soils
mostly reddish brown to black silt loam, silty clay loam or day loam, without
stones. Country rock horizontal light brown sandstone, exposed only on tops
of morros and on cliffs along the Bio Parnaiba.
This habitat: babagu palm grove with adult &
young trees.	25 May 1962
Flowers yallow.
leg. George Eiten and Liene T. Eit§n, no. 1*716
Distributed by the Instituto de Botànica, Sao Paulo
—Chamaecrista rotundifolia (Persoon ) Greene var.
rotundifolia
00978489