Panicum trichoides Sw.

• Region

  South America

• Country

  Brazil

• State/Province

  Maranhão

• County/Municipio

  Loreto Mun.

• Locality

  "Ilha de Balsas" region, between the Rios Balsas and Parnaíba. About 40 km. south of Lorêto. At place called "Picada" about 100m S of the creek, "Riacho da Picada". In gully of small tributary brook (now dry) called "Vao de Estrebaria"

• Elevation

  Alt. 250 m. (820 ft.)

• Coordinates

  -7.43, -45.12

• Distribution

  Map all specimens of this taxon

FLORA OF BRAZIL
STATE OF MARANHÀO
Panicum trichoides Swartz
(det. *.R.Swallen,1964)
Municipio de Loreto: “Ilha de Balsas” region, between the
Rios Balsas and Parnaiba. About 40 km. south of LORETO.
oa.7° 26’S., 45° 7 rw. At place called 'Ticada*,about 100 m.
5 of the creek, "Biacho da Picada"*» Alt* ca. 250 m.
Main, vegetation types of region: (1) “chapada”, a semi-closed tree woodland (or
"cerradao”) on flat tops & steep sides of plateaus, tt* ntoop hilly landi and on
some areas of rolling or flat dry land; (2) "tabuleiro", a semi-closed woodland,
vS1"
BOTANICAL
GardE^
or “cerradao”, 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 hUls; (5) “var-
j&o”, 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 Rio Parnaiba and
some of its tributary streams.M AJlwegetation 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 & taU shrubs ("capoeira”); some areas of
"chapada” with dense secondary vegetation ("carrasco”). Upland soUs 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: in gully of small tributary brook (now
called "Vao de Kstrebaria*' cut into the base
of a gently-sloped side of a low plateau, where it
joins the creek plain. The gully is lined with a
narrow low-tree gallery forest.	2g
leg. George Eiten and Liene T. Eiten, no. 38^.0A
Distributed by the Institute de Bot&nica, S&o Paulo
00864638