Hypericum brachyphyllum

(Spach) Steudel

Nomencl. Bot. ed. 2, 1: 787. 1840.

Basionym: Myriandra brachyphylla Spach Hist. Nat. V é g. 5: 435. 1836
Treatment appears in FNA Volume 6. Treatment on page 80. Mentioned on page 76, 79.

Shrubs, erect, forming round bush, 3–15 dm, bark smooth, not metallic-silvery. Stems: internodes sometimes 4-lined at first, soon 2-winged, not terete. Leaf blades linear, 6–12 × 0.5–0.7 mm, base articulated deciduous with leaf, cf. 8. H. tenuifolium, parallel, margins revolute, apex rounded-apiculate, midrib unbranched. Inflorescences ± narrowly cylindric, 3–15-flowered, with 3–5-flowered dichasia or flowering branches from to 10 proximal nodes. Flowers 10–13 mm diam.; sepals deciduous, not enclosing capsule, 5, linear, unequal, 2.5–4.5 × 0.5–1 mm; petals 5, bright yellow, obovate-spatulate, 5–8 mm; stamens deciduous, 40–45; ovary 3-merous; styles longer than ovaries. Capsules narrowly cylindric to narrowly ovoid-conic, 3.5–5 × 1.5–2 mm. Seeds not carinate, 0.4–0.6 mm; testa finely reticulate. 2n = 18.

Phenology: Flowering summer (Jul–Aug).
Habitat: Moist habitats, pine flatwoods, pond margins, borrow pits, swamp woodland, lowland coastal plain
Elevation: 0–100 m


V6 126-distribution-map.jpg

Ala., Fla., Ga., La., Miss.


Hypericum brachyphyllum is bushier than H. nitidum subsp. exile, with relatively small flowers, capsules, and, usually, leaves, and shorter styles. The bushy habit, two-sided shoots, and glossy leaves without prominent base or apical hydathode, as well as the wet habitats, all distinguish it from H. tenuifolium.

Selected References


Lower Taxa

... more about "Hypericum brachyphyllum"
Norman K. B. Robson +
(Spach) Steudel +
Myriandra brachyphylla +
Ala. +, Fla. +, Ga. +, La. +  and Miss. +
0–100 m +
Moist habitats, pine flatwoods, pond margins, borrow pits, swamp woodland, lowland coastal plain +
Flowering summer (Jul–Aug). +
Nomencl. Bot. ed. +
Ascyrum +, Crookea +, Sanidophyllum +  and Sarothra +
Hypericum brachyphyllum +
Hypericum sect. Myriandra +
species +