Rudbeckia sect. Dracopis

(Cassini) A. Gray in A. Gray et al.

in A. Gray et al., Syn. Fl. N. Amer. 1(2): 263. 1884.

Basionym: Obeliscaria subg. Dracopis Cassini in F. Cuvier, Dict. Sci. Nat. ed. 2, 35: 273. 1825
Synonyms: Undefined sect. Dracopis (Cassini) Cassini
Treatment appears in FNA Volume 21. Treatment on page 45.

Annuals, 25–60 (–120) cm (taprooted). Stems green (glaucous, glabrous). Leaves bluish green, glaucous; basal (seldom persisting to flowering) petiolate or sessile, blades elliptic, lanceolate, oblanceolate, oblong, or ovate, not lobed, bases (cauline) auriculate and clasping, margins crenate, entire or serrate, apices acute or acuminate, faces glabrous; cauline sessile, blades elliptic, lanceolate, oblanceolate, oblong, or ovate, bases auriculate and clasping, margins crenate, entire or serrate, apices acute or acuminate, faces glabrous. Heads in loose, corymbiform arrays or borne singly. Phyllaries in 2 series (lengths of outer 2–5+ times inner, inner similar to and sometimes interpreted as paleae). Receptacles ovoid to conic; paleae surpassing cypselae (margins ciliate), apices obtuse to acute, often mucronate, faces hairy subapically, glabrous near apices. Ray-florets 6–10+; corollas yellow, sometimes partly orange or maroon (laminae often with proximal maroon splotch). Discs 15–30 × 8–15 mm. Disc-florets to 400+; corollas proximally greenish yellow, distally purplish; styles ca. 5 mm, branches ca. 1.7 mm, proximal 1/2 stigmatic, apices subulate. Cypselae 1.8–2.5 mm; pappi 0. x = 16.

Distribution

c, e United States

Discussion

Species 1.

Rudbeckia sect. Dracopis is sometimes recognized at generic rank as Dracopis. DNA-based phylogenetic analyses support its placement in Rudbeckia, where it was treated by Gray as a section. The single species resembles those in sect. Macrocline; it is often placed there based on DNA evidence; the relationship is not uniformly conclusive.

Selected References

None.

... more about "Rudbeckia sect. Dracopis"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subulate;mucronate;obtuse;acute +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +, corymbiform +  and loose +
indeterminate +  and determinate +
Lowell E. Urbatsch +  and Patricia B. Cox +
(Cassini) A. Gray in A. Gray et al. +
sessile +  and petiolate +
auriculate +
Obeliscaria subg. Dracopis +
compound +  and simple +
ovate;oblong;ovate;oblong;oblanceolate;lanceolate;elliptic;not lobed;ovate;oblong;ovate;oblong;oblanceolate;lanceolate;elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
1.7 cm17 mm <br />0.017 m <br /> (?) +
barbellulate +  and barbellate +
purplish +, greenish yellow +, maroon +, orange +  and yellow +
hairy +  and glabrous +
flattened +, fusiform-terete +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
8mm;15mm +
c +  and e United States +
glabrous +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
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 +
sessile +  and petiolate +
bluish green +
deltate +  and lance-linear +
serrate +  and entire +
2-carpellate +
persistent +
0 +  and 2 +
subulate +  and aristate +
3 +  and 21 +
in A. Gray et al., Syn. Fl. N. Amer. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
ovoid;conic +
connate +  and distinct +
2 +  and 5 +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
5 cm50 mm <br />0.05 m <br /> (?) +
Undefined sect. Dracopis +
Rudbeckia sect. Dracopis +
Rudbeckia +
section +
cylindric +
entire +  and toothed +
60 cm600 mm <br />0.6 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +
80 cm800 mm <br />0.8 m <br /> (200 cm2,000 mm <br />2 m <br />) +
shrub +  and subshrub +