Le Jardin de Mère Nature dans une Petite Planète - Pima County

without having mature panicles, Pages 226-227), 43 (102409 - Sporobolus cryptandrus A. Gray), 46
(Page 114), 48, 58, 63 (102409 - color presentation), 77, 85 (102409 - color presentation of dried
material), 105, 127, HR*
Trichachne californica (see Digitaria californica)
Tridens muticus (J. Torrey) G.V. Nash: Slim Tridens
COMMON NAMES: Slim Tridens, Tridente. DESCRIPTION: Terrestrial perennial tufted
graminoid (a bunchgrass 3 to 32 inches in height and 3 to 4 inches in width at the base, one plant was
reported to be 32 inches in height and 4 inches in width at base); the foliage is bluish-green or gray-green
curing to a light straw-yellow; flowering generally takes place between mid-April and early June and
again between early August and mid-November (additional records: one for mid-January, one for early
March and one for mid-March). HABITAT: Within the range of this species it has been reported from
mountains; gravelly peaks; mesas; rocky cliffs; along bouldery and rocky canyons; along rocky and
gravelly canyon bottoms; gorges; bouldery-sandy grottos; talus slopes; ledges; ridges; bouldery ridgetops;
foothills; rocky and gravelly hills; bouldery, rocky and gravelly hillsides; rocky and gravelly slopes; rocky
bajadas; boulder, rocky, shaley and chalky outcrops; amongst boulders and rocks; bases of rocks; lava
flows; lava fields; plains; sandy-clayey flats; basins; valley floors; railroad right-of-ways; along rocky,
gravelly-sandy and sandy roadsides; within rocky and gravelly arroyos; draws; ravines; seeps; springs;
along streams; bouldery-sandy riverbeds; along and in rocky, gravelly, gravelly-loamy and sandy washes;
drainage ways; around pools; rocky banks of washes; gravelly edges of streambeds; benches; stock tanks,
and riparian areas growing in dry rocky and gravelly desert pavements; bouldery, bouldery-sandy, rocky,
rocky-gravelly, rocky-sandy, gravelly and sandy ground; rocky loam, gravelly loam, sandy-clayey loam,
clayey loam and loam ground; rocky clay, sandy clay and clay ground; sandy silty ground, and chalky
ground, occurring from 500 to 6,300 feet in elevation in the forest, woodland, scrub, grassland,
desertscrub and wetland ecological formations. NOTES: This plant may be an attractive component of a
restored native habitat. Slim Tridens is browsed by Collard Peccary (Peccari tajacu), Mule Deer
(Odocoileus hemionus) and other herbivores and birds and rodents feed on the seed. Tridens muticus is
native to south-central and southern North America. *5, 6, 15, 16, 33 (Page 98), 43 (102509 - Tridens
muticus Nash,), 46 (Page 91), 63 (102509 - color presentation), 77, 85 (102509 - color presentation of
dried material), 105*
Tridens pulchellus (see Dasyochloa pulchella)
Triodia pulchella (see Dasyochloa pulchella)
Urochloa arizonica (F.L. Scribner & E.D. Merrill) O. Morrone & F.O. Zuloaga: Arizona Signalgrass
SYNONYMY: Brachiaria arizonica (F.L. Scribner & E.D. Merrill) S.T. Blake, Panicum
arizonicum F.L. Scribner & E.D. Merrill. COMMON NAMES: Arizona Panicgrass, Arizona Panicum,
Arizona Signal Grass, Arizona Signalgrass, Piojillo de Arizona. DESCRIPTION: Terrestrial annual
graminoid (6 to 26 inches in height); the flowers are purple; flowering generally takes place between early
August and early November (flowering beginning as early as June has been reported). HABITAT: Within
the range of this species it has been reported from mountains; mesas; canyons; canyon bottoms; chasms;
rocky talus; meadows; foothills; rocky hills; rocky and rocky-clayey hillsides; bouldery, rocky, rockygravelly,
rocky-sandy, stony and gravelly slopes; alluvial fans; gravelly bajadas; rocky banks; rock
outcrops; amongst boulders; bases of rocks; sand dunes; sandy flats; coastal dunes; along roadsides;
arroyos; bottoms of arroyos; sandy draws; along rocky ravines; seeps; rivulets; along and in gravellysandy
streambeds; along and in rocky, gravelly and sandy washes; drainages; within clayey drainage
ways; rocky-sandy and sandy banks of washes; shores of lakes; benches; terraces; sandy floodplains;
mesquite bosques; margins of stock tanks; ditches; riparian areas, and disturbed areas growing in dry
bouldery, bouldery-gravelly, rocky, rocky-gravelly, rocky-sandy, stony, gravelly and sandy ground;