Triadenum tubulosum

(Walter) Gleason

Phytologia 2: 289. 1947.

EndemicSelected by author to be illustrated
Basionym: Hypericum tubulosum Walter
Synonyms: Elodes drummondii SpachE. pauciflora SpachE. tubulosa (Walter) PurshH. petiolatum var. tubulosum (Walter) FernaldH. walteri var. tubulosum (Walter) LottTriadenum longifolium Small
Treatment appears in FNA Volume 6. Treatment on page 104. Mentioned on page 103, 105.
Revision as of 21:42, 26 July 2019 by FNA>Volume Importer
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Herbs erect, to 10 dm, sometimes branching from near base, sometimes with ascending branches in distal 1/2+. Stems: internodes 2-lined at first, then terete. Leaves sessile or (distal) subsessile, rarely amplexicaul; blade narrowly oblong or elliptic to oblanceolate, 50–120(–150) × 10–40(–50) mm, base rounded to truncate or subcordate, apex rounded or rounded-apiculate to retuse, gland dots intramarginal. Inflorescences spiciform-cylindric, 3–7-flowered from terminal node, with sessile or pedunculate inflorescences and flowering branches from to 4 proximal nodes. Flowers 15 mm diam.; sepals narrowly oblong, 4–7 × 1–1.5 mm, apex acute to obtuse; petals elliptic-obovate, 5–8 mm; stamen fascicles 4–7 mm; filaments 1/2+ connate; styles 0.8–1.5 mm. Capsules cylindric, 8–12 × 3.5–4 mm, apex obtuse. Seeds 0.8–1.2 mm.


Phenology: Flowering late summer–early fall (Aug–Sep).
Habitat: Swampy or marshy ground in woods
Elevation: 0–500 m

Distribution

V6 184-distribution-map.jpg

Ala., Ark., Fla., Ga., Ill., Ind., Ky., La., Miss., Mo., N.C., Ohio, S.C., Tenn., Tex., Va.

Discussion

The absence of laminar glands in leaves is a more reliable characteristic for differentiating Triadenum tubulosum from T. walteri than sessile versus petiolate leaves, which are not always quite sessile towards the inflorescence in T. tubulosum, or sepals, which can be obtuse in both.

Selected References

None.

Lower Taxa

None.
... more about "Triadenum tubulosum"
Norman K. B. Robson +
(Walter) Gleason +
Hypericum tubulosum +
Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Ind. +, Ky. +, La. +, Miss. +, Mo. +, N.C. +, Ohio +, S.C. +, Tenn. +, Tex. +  and Va. +
0–500 m +
Swampy or marshy ground in woods +
Flowering late summer–early fall (Aug–Sep). +
Endemic +  and Selected by author to be illustrated +
Elodes drummondii +, E. pauciflora +, E. tubulosa +, H. petiolatum var. tubulosum +, H. walteri var. tubulosum +  and Triadenum longifolium +
Triadenum tubulosum +
Triadenum +
species +