Euphorbia rhabdotosperma explained

Euphorbia rhabdotosperma is a species of flowering plant in the Euphorbiaceae family.

Description

A Euphorbia rather resembling a small Euphorbia helioscopia, with correspondingly smaller stem leaves (5-13(20) x 2-5(8) mm), raylet leaves (5-11 x 3-7 mm) and fruit (2.5-3 mm), and critically differing by its seed surface. See PoWo herbarium specimen.

Seed surface vs. E. helioscopia is longitudinally striate-rugulose vs. favose-reticulate.^[1] / striate-rugulose vs. foveolate(-reticulate) This is an unusual surface.^[2]

Distribution

Native to Iran, North Caucasus, Transcaucasus, Turkey, Turkmenistan (PoWo map).

Turkish regional distribution is Antalya and northwards (map bizimbitkiler.org.tr).

Habitat

Generally : River banks, foothills, edge of irrigated fields, limestone rocks, steppes; 1100-1400 m.^[2]

Turkey : Steppe, limestone rocks, fields, 1100-1300 m.^[1]

Iran : Steppes, edge of fields and orchards, at 500-1600 m.^[3]

Notes and References

1. Book: Flora of Turkey and the East Aegean Islands, vol. 7 . Davis.
2. Web site: Diversity of the genus Euphorbia (Euphorbiaceae) in SW Asia .
3. Web site: Synopsis of Euphorbia subgen. Esula sect. Helioscopia (Euphorbiaceae) in Iran with the description of Euphorbia mazandaranica sp. nov. .