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| Euphorbia yadgirensis Sarojin. and Raja Kullayisw, in Naidu et Kusom, 2023. DOI: 10.1111/njb.04041 |
Abstract
Euphorbia yadgirensis is a new species described and illustrated from the scrub forest of Rayangole village, Yadgiri District of Karnataka, India. It belongs to E. subg. Chamaesyce sect. Hypercifoliae and resembles Euphorbia kadapensis. However, it differs in nature of stipules and bracteole, structure of limbs, lack of sutures on capsules, etc.
Keywords: Chamaesyce. Euphorbia yadgirensis, Hypercifoliae, Karnataka, Rayangole, scrub forest
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| Euphorbia yadgirensis sp. nov. (A) habit, (B) young cyathium, (C) stipules, (D) involucral lobes, limbs and glands, (E) female floret, (F) capsule top view, (G) capsule bottom view, (H) seeds. |
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| Euphorbia yadgirensis sp. nov. (A) habit, (B) cyathium at shoot apex, (C) stipules, (D) male floret, (E) portion of involucral cup showing lobes, glands and limbs, (F) capsule top view, (G) capsule bottom view, (H) ripe capsule, (J) cyathia, (K) seeds. |
Euphorbia yadgirensis Sarojin. and Raja Kullayisw. sp. nov.
Euphorbia kadapensis sensu Raja et al. (2020)
Diagnosis: An annual decumbent herb growing between rocks in scrub forest. Stem glabrous with sympodial dichotomous branching; stipules laciniate; limb of gland bi- or trifid for one fourth of its length; capsules trigonous, prominently keeled; stigmas simple; seeds transversely deeply rugulose. It resembles E. kadapensis Sarojin. and R.R.V.Raju in having filiform branches, elliptic leaves, dissected limb, long style, and trigonous capsule, but differs in stipules (laciniate versus scaly), limb (bi- or trifid for one fourth of its length versus bi- or trifid for half of its length), number of staminate florets (9−12 versus 15−18), bract of male floret (laciniate versus simple), capsules (ridges absent along the sutures versus prominently ridged along sutures), seeds (transversely deeply rugulose versus transversely slightly rugulose) (Table 1).
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Etymology: The species is named after the type locality of the Yadgiri District in the north of Karnataka state. The type locality is dominated by granite rocks and scrub brush.
Sarojini Devi Naidu and Raja Kullayiswamy Kusom. 2023. Euphorbia yadgirensis sp. nov., (Euphorbiaceae) from Karnataka state, India. Nordic Journal of Botany. e04041. DOI: 10.1111/njb.04041
