Dimeria anandibaiana Paithane, Bhuktar, Chorghe, Gosavi, Kashetti, S. B. Patil, sp. nov.
Creators: name: Paithane, V. A.
name: Bhuktar, A. S.
name: Chorghe, A. R.
name: Gosavi, K. V. C.
name: Kashetti, R. P.
name: Patil, S. B.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Dimeria
Dimeria anandibaiana

description: Dimeria anandibaiana Paithane, Bhuktar, Chorghe, Gosavi, Kashetti, S.B.Patil sp. nov., (FIGURE 1–4)
Type:— INDIA. Maharashtra: Sindhudurg District, Vaibhavwadi, 160. 49’N, 730. 75’ E, ± 98 m elevation (holotype CAL!; isotypes VH! & BSI!).
Diagnosis:— Dimeria anandibaiana resembles D. stapfiana. However, D. anandibaiana has spikelets 7–13 mm long, (vs. 4–7 mm long); lower glume 6–7 mm long, conspicuously thin wing from base to apex (vs. 4–6 mm long narrowly rounded wing at apex); upper glume 9–12 mm long, conspicuously bilobed at apex (vs. 2.5–4.5 mm long, single lobed at apex). The detailed morphological differences between D. anandibaiana and D. stapfiana are summarized in Table 1.
Annuals. Culm ca. 60 cm tall, erect, slender, branched or unbranched, terete, nodes bearded. Leaf sheath 3–7 cm long, terete to sub-compressed, shorter than the internodes, glabrous at base, tubercle-based hairs on top portion at dorsal side, margins hyaline, sometimes with tubercle- based hairs. Ligule 0.5–0.7 mm long, membranous, lacerate at tip. Leaf blade flat, 4–10 × 0.2–0.5 cm, linear elliptic to linear-lanceolate, acute to acuminate, consistently tubercle based long hairs on both surfaces, midrib prominent on lower surface.
Racemes 2–4, unequal, terminal, 5–7 cm long, with ca. 10 cm long spatheaceous peduncle. Rachis 0.2–0.3 mm wide, unequal, trigonous to terete, filiform, glabrous to sparsely scabarulose. Spikelets pedicelled; pedicel 1–2 mm long, trigonous to terete, glabrous; lip broad, oblique, concave, glabrous. Spikelets 7–13 × 1.5–2 mm, laterally compressed, awned, elliptic to oblong; callus knob like, 1–2 mm long, sub-compressed to terete, narrowly oblique with tuft of hairs at base, glabrous at apex. Lower glume 6–7 × 0.5–0.7 mm, elliptic to lanceolate, acute, coriaceous, margins hyaline, apex acute to obtuse, narrowly 0.2–0.5 width with thick wing at back from base to apex; dense tuft of hairs on 1/3 basal part of wing, long hairs to short hairs from middle to apex of wing. Upper glume 9–12 × 1–1.5 mm, lanceolate to elliptic coriaceous, margins hyaline with sparsely ciliate, apex bi-lobed; inner lobe hyaline while outer coriaceous, ca. 0.7–1 mm broad distinct wing at back from base to apex; wing densely tuft of hairs to scabrous from base to apex. Florets two; lower floret empty. Lower lemma 4–4.5 × ca. 0.5 mm, folded, narrowly oblanceolate, acute to obtuse, hyaline, membranous, 1-nerved, margin fimbriate; palea absent. Upper floret bisexual. Upper lemma 4–6 × ca. 0.5 mm, oblong to lanceolate, bifid at apex, 1 nerved, hyaline, membranous, 2.5–3 cm long geniculate awn from sinus with hairy dark colored twisted 10–12 mm long, column and antrorsely barbed 14–18 mm long bristle; palea absent. Lodicules 2, ca. 0.5 mm long, papery. Stamens 2, anthers ca. 2.5–3.5 mm long; pistil 1, ca. 4 mm long, ovary ca. 0.5 mm long, style ca. 1 mm long, stigma plumose ca. 2 mm long. Caryopsis linear-ovate to linear-lanceolate, laterally compressed, brown, 4 × 0.5 mm; embryo white, ca. 1.5 mm long.
Phenology: —August–January.
Etymology:—The specific epithet honours Anandibai Bhikaji Raorane Arts, Commerce and Science College, Vaibhavwadi, Sindhudurg (M.S.) India.
Ecological note:—The species grows on low elevated open grass land lateritic plateaus along the forest margins associated with Andropogon pumilus Roxb (1820: 277)., Arundinella ciliata Nees ex Miq. (1851: 30), Drosera indica L. (Linnaeus 1753:282), Eulalia shrirangii Salunkhe & Potdar (2004: 625), Heteropogon contortus (L.) P.Beauv. ex Roem. & Schult. (1817: 836), Rhynchospora wightiana (Nees) Steud. (1855: 148) and Tadehagi triquetrum (L.) H. Ohashi. (1973: 290)
Habitat:—Margins of evergreen forests.
Distribution and conservation status:—Presently the species is known from only type locality. According to IUCN (2024) the species categorized as “Data Deficient” (DD).
description: Published as part of Paithane, V. A., Bhuktar, A. S., Chorghe, A. R., Gosavi, K. V. C., Kashetti, R. P. & Patil, S. B., 2024, Dimeria anandibaiana (Poaceae: Panicoideae): a new species from Konkan region of Maharashtra, India, pp. 150-156 in Phytotaxa 661 (2) on pages 151-152, DOI: 10.11646/phytotaxa.661.2.2, http://zenodo.org/record/13218354