Rudbeckia mohrii

A. Gray

Proc. Amer. Acad. Arts 17: 217. 1882.

Common names: Mohr’s or grassy coneflower
Endemic
Treatment appears in FNA Volume 21. Treatment on page 50. Mentioned on page 46.

Perennials, to 110 cm (rhizomatous, roots fibrous). Leaves green (glaucous), blades (3–5-nerved) narrowly lanceolate to linear (not lobed), leathery, bases attenuate, margins entire (sometimes ciliate), apices acute, faces glabrous; basal petiolate, 10–40 × 0.5–1.5 cm; cauline petiolate or sessile, 2–25 × 0.2–0.8 cm. Heads (3–15) in ± corymbiform arrays. Phyllaries to 1 cm. Receptacles ovoid or ellipsoid to hemispheric; paleae 4–5 mm, glabrous or sparsely hairy, apices obtuse, acuminate. Ray-florets 7–14; laminae elliptic to oblanceolate, 12–30 × 5–10 mm, abaxially glabrous. Discs 9–15 × 7–17 mm. Disc-florets 100–200+; corollas yellowish green proximally, maroon distally, 3–4 mm; style-branches ca. 1 mm, apices acute to blunt. Cypselae 3.4–4.2 mm; pappi ± coroniform, of connate or distinct scales to 1.2 mm. 2n = 36.


Phenology: Flowering summer–fall.
Habitat: Wet pine savannas, along ditches and bayous, shallow water
Elevation: 0–50 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Rudbeckia mohrii"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
acute;blunt +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Lowell E. Urbatsch +  and Patricia B. Cox +
A. Gray +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
attenuate +
compound +  and simple +
narrowly lanceolate;linear +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
0.1 cm1 mm <br />0.001 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
barbellulate +  and barbellate +
sessile +  and petiolate +
sessile +  and petiolate +
2 cm20 mm <br />0.02 m <br /> (25 cm250 mm <br />0.25 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.8 cm8 mm <br />0.008 m <br /> (?) +
Mohr’s or grassy coneflower +
maroon +  and yellowish green +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
hairy +  and glabrous +
flattened +, fusiform-terete +  and obpyramidal +
fertile +  and bisexual +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
fertile +  and bisexual +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
7mm;17mm +
Fla. +  and Ga. +
0–50 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Wet pine savannas, along ditches and bayous, shallow water +
discoid +  and radiate +
in loose , corymbiform to paniculiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.1 cm1 mm <br />0.001 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
fusiform;turbinate or broadly campanulate +
12mm;30mm +
elliptic +  and oblanceolate +
5mm;10mm +
sessile +  and petiolate +
deltate +  and lance-linear +
2-carpellate +
hairy +  and glabrous +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +
0 +  and 2 +
coroniform +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Flowering summer–fall. +
3 +  and 21 +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Proc. Amer. Acad. Arts +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
ellipsoid;hemispheric +
distinct +  and connate +
2 +  and 6 +
unequal +
0 cm0 mm <br />0 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
exalbuminous +
purplish +, bluish green +  and green +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Rudbeckia subg. Macrocline +
Rudbeckia mohrii +
Rudbeckia sect. Macrocline +
species +
cylindric +
serrate +, dentate +  and entire +
0 cm0 mm <br />0 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
80 cm800 mm <br />0.8 m <br /> (200 cm2,000 mm <br />2 m <br />) +
shrub +  and subshrub +