Lygodesmia aphylla

(Nuttall) de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 198. 1838.
Common names: Roserush
Endemic
Basionyms: Prenanthes aphylla Nuttall Gen. N. Amer. Pl. 2: 123. 1818
Synonyms: Erythremia aphylla (Nuttall) Nuttall
Treatment appears in FNA Volume 19. Treatment on page 370. Mentioned on page 373.

Perennials, 30–80 cm solitary; roots or rhizomes fleshy; caudices woody, branched. Stems 1, erect, green, simple or sparsely branched distally, strongly striate. Leaves (basal in rosettes, sometimes withered at flowering); proximal blades linear, 100–350 × 2–3 mm, margins entire; cauline similar or reduced to scales. Heads (1–5) borne singly or in corymbiform arrays. Involucres cylindric, 14–22 × 5–6 mm, apices narrow. Calyculi of 8–14, deltate bractlets 1–5 mm, margins scarious, erose-ciliate (faces tomentulose). Phyllaries 8, linear, 14–22 mm, margins scarious, apices often purplish, acute, appendaged. Florets 8–10; corollas pink to lavender or blue, 30–40 mm, ligules 4–6 mm wide. Cypselae (subcylindric) 11–14 mm (faces smooth, abaxial weakly striate, glabrous, adaxial sulcate); pappi 12–18 mm. 2n = 18.


Phenology: Flowering Feb–Nov.
Habitat: Dry sandy soils, flatwoods, pine barrens, disturbed areas, roadsides
Elevation: 0–200 m

Discussion

Lygodesmia aphylla is recognized by its erect, sparingly branched habit, leafless stems, relatively large involucres and florets, apical appendages on phyllaries, and grooved cypselae. The habit is similar to that of L. texana. The basal leaves are frequently absent at flowering and are entire, not pinnately lobed as in L. texana.

Selected References

None.

Lower Taxa

None.

... more about "Lygodesmia aphylla"
David J. Bogler +
(Nuttall) de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
Prenanthes aphylla +
Roserush +
Fla. +  and Ga. +
0–200 m +
Dry sandy soils, flatwoods, pine barrens, disturbed areas, roadsides +
Flowering Feb–Nov. +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Erythremia aphylla +
Lygodesmia aphylla +
Lygodesmia +
species +