Rhynchospora indianolensis

Small

Fl. S.E. U.S., 193, 1327. 1903.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 207. Mentioned on page 201, 208, 210.
Please click on the illustration for a higher resolution version.
Illustrator:

Copyright:

Plants perennial, cespitose, to 100 cm; rhizomes absent. Culms stiffly erect or ascending, leafybased, triangular, multiribbed. Leaves ascending or erect, crowded toward culm base, shorter, more widely spaced distally, longest overtopping or equaling subtended inflorescences; principal blades flat, trigonous distally, 4–6 mm wide, apex attenuate, trigonous. Inflorescences terminal and axillary, compounds of fascicles, nearly umbellate; clusters hemispheric to nearly capitate, 1.5–2 cm wide; 1 cluster nearly sessile, others on slender rays to 7 cm, sometimes penultimate node with single cluster on peduncle 7–12 cm. Spikelets light-redbrown, lanceoloid, 6–7 mm, apex acute; fertile scales lanceovate, 5 mm, apex acute to blunt, midrib shortexcurrent or not. Flowers: perianth bristles 6, overtopping tubercle base, antrorsely barbellate. Fruits 1 per spikelet, (5.5–) 6–7 mm; body obovoid, 3–4 × 2–2.5 mm, margins thick, crimped, surfaces level or concave, minutely pebbled; tubercle narrowly conic, 2grooved, 3–4 mm, base blunt, stout, capping fruit apex, tip barely exserted.


Phenology: Fruiting early summer–fall.
Habitat: Silty shallows of pools, prairie swales, ditches
Elevation: 0–100 m

Discussion

Rhynchospora indianolensis was considered by G. Kükenthal to be closely related to, if not the same as, the Cuban R. scutellata Grisebach but with fruit of different dimensions and sculpture. W. W. Thomas (1984) believed the two to be conspecific.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number."longest" is not a number."wider" is not a number.

acute;blunt +
Robert Kral +
scabridulous +  and scabrid +
v--shaped +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
warty +, papillate +, alveolate +  and pitted +
obovoid +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
hemispheric +  and nearly capitate +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
multiribbed +  and leafybased +
ascending +  and erect +
triangular +
0–100 m +
distalmost +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
biconvex +  and trigonous +
Silty shallows of pools, prairie swales, ditches +
racemose +, corymbose +  and paniculate +
erect +, rarely +  and spreading +
spaced +  and crowded +
erect;ascending +
cauline +  and basal +
keeled;terete;keeled;terete +
revolute +  and involute +
decurrent +
penultimate +
7 cm70 mm <br />0.07 m <br /> (12 cm120 mm <br />0.12 m <br />) +
plumed +  and barbed +
deciduous +  and persistent +
shorter or longer +
of 2-12(-20) bristles +
Fruiting early summer–fall. +
2-3(-4)-carpellate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
3 (?) +  and 1 (?) +
Fl. S.E. U.S., +
adventitious +
basal +  and proximal +
lanceovate +
5 cm50 mm <br />0.05 m <br /> (?) +
cylindric +
0 cm0 mm <br />0 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Illustrated +  and Endemic +
light-redbrown +
1 +, 3 +  and 100 +
lanceoloid +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
cleft +, 2-fid +  and undivided +
Dichromena +  and Psilocarya +
Rhynchospora indianolensis +
Rhynchospora +
species +
exserted +
sulcate +  and 2-edged +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
plant +  and cespitose +