Hyparrhenia rufa (Nees) Stapf

• Region

  South America

• Country

  Brazil

• State/Province

  Maranhão

• County/Municipio

  Lorêto Mun.

• Locality

  "Ilha de Balsas" region, between the Rios Balsas and Parnaíba. 1/3 km. W of main house of Fazenda "Morros", about 35 km. south of Lorêto. Along trail from "Morros" to "Gigante"

• Elevation

  Alt. 300 m. (984 ft.)

• Coordinates

  -7.38, -45.07

• Distribution

  Map all specimens of this taxon

00862830
FLORA OF BRAZIL
STATE OF MARANHÀO
Hyparrhenia rufa (Nees) Stapf
(det • J#R.Swallen,1964.)
Municipio de Loreto: “Ilha de Balsas” region, between the Rios
Balsas and* Parnaiba. l/3 lnnt V of main house of Fazenda
“Morros”, about 35 km. south of LORiJTO. Alt. ca. 300 m. Approx«
7*^3 ’S., 45° 4 ’W. Along trail from »Mottos11 to "Gigante*.
Main vegetation types of region: (1) “chapada”, a seml-closed tree woodland (or
“cerrad&o”) on flat tops & steep sides of plateaus,	and on
some areas of roUlng or flat dry land; (2) “tabulelro”, a semi-closed woodland,
or “cerrad&o'’, 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 species on low
moist flat land and in narrow valleys between “tabuleiro”-covered hills; (5) “var-
j&o”, low moist flat land with scattered forest trees of one or a few species;
(6) “cocal”, thick groves of babacu palm on flat river plain of Bio Pamalba and
some of its tributary streams. Md&U vegetation types completely deciduous during
dry season. All brooks intermittent. Annual ground fires and cattle grazing in
aU areas. Part of “tabulelro” 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 (“capoelra”); 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 Bio Parnaiba.
This habitat: cattle trail in open "tabuleiro".
Grass in clumps, to 1*6 m. tall,in narrow1erosion
gully. (Grows smaller & with fewer stems per clump
outside gullies.) This species said not to toe native
in region, but to hare entered with imported cattle
from Municipio de Balsas to west. n.T.nCapim lageadon.
leg. George Eiten and Liene T. Eiten, no. ¿871
(All specimens of this number from one clump.)
Distributed by the Institute de Bot&nlca, S&o Paulo