Difference between revisions of "Schistophragma intermedium"

(A. Gray) Pennell

Notul. Nat. Acad. Nat. Sci. Philadelphia 43: 2. 1940.

Common names: Harlequin spiralseed
Illustrated
Basionym: Conobea intermedia A. Gray in W. H. Emory Rep. U.S. Mex. Bound. 2(1): 117. 1859
Treatment appears in FNA Volume 17. Treatment on page 275. Mentioned on page 274.
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|genus=Schistophragma
 
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|species=Schistophragma intermedium

Revision as of 20:26, 27 May 2020

Stems simple or branching, 3–10(–15) cm. Leaves 2 per node; blade ovate to lanceolate, 10–20 × 3–10 mm, ultimate segments ovate to obovate. Pedicels ascending, 1–2(–4) mm in flower, 2–5(–7) mm in fruit, glabrous or glandular-villosulous. Flowers: calyx not falcate, abaxial lobe shorter than adaxial lobes, 2–4 × 0.3–0.5 mm, glabrous or glandular-villosulous; corolla glabrous, tube funnelform, 5–6 mm, throat open, pale yellow, lobes spreading, violet to purple, usually with darker lines, 1.5–2 × 1–2 mm; stamens included; style 2–2.5 mm. Capsules green or purple, ovoid, 4–6(–8) × 1.5–2.5 mm, slightly upcurved. Seeds shallowly reticulate, longitudinally spiraled. 2n = 40.


Phenology: Flowering Jul–Sep.
Habitat: Dry, sunny slopes and washes.
Elevation: 1000–2500 m.

Distribution

Ariz., N.Mex., Mexico (Chihuahua, Sonora).

Discussion

Schistophragma intermedium is closely related to Leucospora multifida, which has two or three (or four) leaves per node, corolla tubes 2–3 mm, and smaller fruits with obtuse or rounded apices. Schistophragma intermedium might be confused with species of Verbena due to the pinnatifid leaves and purple tubular corollas; the flowers of Schistophragma are solitary in leaf axils, and the corollas are bilabiate.

Selected References

None.

Lower Taxa

None.