Aristida setifolia Kunth

• Region

  South America

• Country

  Brazil

• State/Province

  Maranhão

• County/Municipio

  Loreto Mun.

• Locality

  "Ilha de Balsas" region between the Rios Balsas and Parnaíba. About 20 km south of Loreto. On trail from Fazenda Santa Rita to Faz. Trabalhosa

• Elevation

  Alt. 200 - 300 m. (656 - 984 ft.)

• Coordinates

  -7.22, -45.12

• Distribution

  Map all specimens of this taxon

Det.: Hilda M. Longhi-Wagner Data:
Herbärio ICN	UFRGS - Porto Alegre - Brasil
3</
FLORA OF BRAZIL
STATE OF MARANHAO
Aristida setifolia Trin.
(det.J.E.Swallen,1964)
Municipio de Loreto: “Ilha de Balsas” region, between the
Rios Balsas and Pamaiba. About 20 km. south of LORfiTO.
ca. 7° J.3 ’S., 45°7—S’W- On trail from Fazenda Santa Rita to
Faz. Trabalhosa.	Alt. 200-300 m.
Main vegetation types of region: (1) “chapada”, a semi-closed tree woodland (or
“cerrad&o") on flat tops & steep sides of plateaus,	and on
some areas of rolling or flat dry land; (2) “tabuleiro”, a semi-closed woodland,
or “cerrad&o”, of different physiognomy & species composition, on tops of billy
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) “caatlnga”, a semi-open forest of few forest tree species on low
moist flat nnrt in narrow valleys between “tabuleiro”-covered hills; (5) “var-
jfto”, low moist flat land with scattered forest trees of one or a few species;
(6) “cocal”,	groves of babacu palm on flat river plain of Rio Pamaiba and
some of its tributary streams. M ifiUvegetation 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” «-nrf 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 clay loam, without
stones. Country rock horizontal light brown sandstone, exposed only on tops
of morros and on cliffs along the Rio Pamaiba.
This habitat: descent from low plateau, ground open
& stony along trail, vegetation disturbed "chapada".
This number in head of dry brook ravine.
7 April 1962
leg. George Eiten and Liene T. Eiten, no. 4179B
Distributed by the Instituto de Bot&nica, S&o Paulo
00861322