Published May 14, 2024
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TABLE 1 in Novelty in Arundinella (Arundinelleae, Panicoideae, Poaceae): Morphological and Molecular Evidences for a New Species from Sikkim Himalaya
Authors/Creators
- 1. Taxonomy and Biosystematics Laboratory, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road,
- 2. Technology Enabling Centre, University of Hyderabad & Department of Science & Technology, Govt. of India, New Delhi, India
- 3. High Altitude Research, Quality Control Laboratory, Forest and Environment Department, Government of Sikkim, Gangtok 737102, Sikkim, India
Description
TABLE 1. Comparison of major morphological traits of Arundinella namprikensis sp. nov., Arundinella nepalensis, Arundinella cochinchinensis, Arundinella stenostachya and Arundinella intricata.
| Characters | Arundinella namprikensis sp. nov. | Arundinella nepalensis | Arundinella cochinchinensis | Arundinella stenostachya | Arundinella intricata | |
|---|---|---|---|---|---|---|
| Plant height | 1–2 m | 0.1–2.0 (–3) m | 1.5–3 m | 1–2.5 m | 0.3–0.8 m | |
| Rhizome | up to 1.5 m long, smooth, glabrous | short, scaly | scaly | scaly, whitish pubescent | short, scaly | |
| Culm nodes | glabrous and smooth | appressed silky pubescent | swollen, densely bearded or appressed silky-pilose glabrescent | glabrous and smooth | ||
| Leaf sheath | abaxially pilose with tubercle-based hairs, adaxially glabrous, densely ciliate along one margin only with tubercle-based hairs | smooth and glabrous, striate, or sparsely to densely covered with tubercle-based hairs, margins short ciliate, rarely both margins eciliate | hispid with tubercle-based hairs at young or glabrous, margin densely short ciliate with tubercle-based hairs | glabrous to pilose on the back, margins densely hairy | smooth and glabrous or pilose, densely ciliate along one margin | |
| Ligule height | (0.2–)0.3–0.5 mm | 0.3–1 mm | 0.3–1.5 mm | 0.5–1 mm | ca. 0.5 mm | |
| Leaf blade | Size | 10–50 × 0.4–1.4 cm | 2–50 × 0.2–1.8 cm | 30–80 × 1–2.5 cm | 13–70 × 0.3–1.6 cm | 11–20 × 0.2–0.5 cm |
| Surface | hispid on both surfaces with tubercle-based hairs | glabrous or thinly to densely pilose with tubercle-based hairs | tuberculate-hispid with tubercle-based hairs or glabrescent | hispid on both surfaces with tubercle-based hairs | glabrous or pilose or upper surface with short hairs just above ligule, smooth and somewhat scabrid on lower surface | |
| Margin | scaberulous | - | scabrous | - | scabrid or often denely ciliate | |
| Panicle | Appearance | open or loosely contracted | open or loosely contracted | narrowly oblong dense | narrowly cylindrical, loosely contracted, dense narrowly elliptic in outline | |
| Size | 40–65 cm long | 10–50 cm long | 30–65 cm long | 9.5–42 cm long | 10–17 cm long | |
| Axil of rachis | villous | - | - | usually villous | densely and finely ciliate | |
| Central axis | smooth, scabrid towards apex, strongly striate (striations wavy), glabrous | scaberulous or almost smooth | scaberulous | scabrid, striate, sparsely pubescent | scabrid-hispidulous | |
| Panicle branches Size | 2–20 cm | 7–20 cm | 5–25 cm | 1.8–10 (–11.5) cm | 3-6 cm | |
| Arrangement | alternate, opposite, subopposite or whorled, erect | alternate or pseudo-whorled or subverticillate or fascicled | crowded in whorls or usually crowded in alternate, suberect whorls | Irregular or sub-whorled | ||
| Branching pattern | lower branches with several branchlets, upper ones mostly simple | simple or lowest branched | - | usually simple or occasionally with secondary branches | - | |
| Arrangement of spikelets | loosely spiculate | loosely to densely spiculate | densely spiculate, concealing the stout main axis | densely spiculate, spike-like | loosely spiculate | |
| Spikelet | 4–5 mm long | 3–5.5 mm long | 3–5 mm long | 2.5–3.7 mm long | 3.8–4.5 mm long | |
| Pedicel | Size | 1.2–8 mm long, | shorter or equal to spikelets | 0.5–5 mm long, | 0.3–2.2 mm long | shorter than the spikelets |
| Surface | scaberulous | - | scaberulous | scabrous or hispid | hairy or scabrid | |
| Lower glume | Size | 2.8–4 × 0.9–1.5 mm | 3–3.5 mm long | 3–4 mm long | 1.9–3.1 mm long | 2.5–3 mm long |
| Vein features | (4–)5–7-veined, midvein keeled, scabrid towards apex, rarely scabrid throughout | strongly 3-veined, veins scabrid | 3–5-veined, scabrid on veins | 3–5-veined, scabrous 3–5-veined on veins | ||
| Upper glume | Size | (3.8–)4.2–5 × 1–1.5 mm 3.5–5.5 × 1.5–2 mm | 4–5 × 1–1.2 mm | - | as long as spikelet | |
| Vein features | 5–7-veined, usually glabrous, sometimes veins with few hispid hairs and margins sparsely hairy | faintly 5-veined | 3–5-veined, glabrous or scaberulous on veins | 5-veined, glabrous | 5-veined, scabrid on veins | |
| Lower floret | Nature | always bisexual | staminate or barren | staminate | staminate or barren | staminate |
| Size | longer than lower glume | equaling or longer than lower glume | slightly longer than lower glume | - | as long as lower glume | |
| Lower lemma | Size | 3–4 × 1–1.6 mm | 2.5−3.5 mm long | 3−3.5 mm long, | 1.9−2.9 mm long | - |
| Vein features | (5–)7-veined, only the midvein somewhat keeled at apex | 3–5-veined | 3−5-veined | 3−5-veined | 5-veined | |
| Surface | glabrous, rarely sparsely hairy at margin, smooth | glabrous, smooth | - | - | - | |
| Upper lemma | Size | 2–2.2 mm long | 1–2 mm long, | 2−2.5 mm long | 1.6−2.3 mm long | 2–3 mm long |
| Apex | usually retuse (- emarginate), sometimes one lobe attached to awn, often obtuse (then awn terminal), fimbriolate | bifid | minutely bifid | apex narrowed into a subentire or very poorly developed minutely lobed awn or awnless | ||
| Surface | glabrous | pubescent below | - | - | - | |
| Upper palea | Size | 2.3–2.4 × 0.5–0.6 mm | 1−2.5 mm long | 2−2.5 mm long | 1.6−2.1 mm long | shorter and narrower |
| Apex | acute with few cilia | minutely bifid | dentate, minutely bifid | acute | - | |
| Margin | margin auriculate (door-like flaps); auricle obliquely obovate-spathulate, strongly overlapping | margin with door-like flaps | - | - | - | |
| Surface | chartaceous, granulate dorsally | subcoriaceous, granulate dorsally | - | - | minutely scabrid | |
| Awn | Size | (2–)4–5 mm long | 3.5–6 mm long | 4–5 mm long | up to 2 mm long | 2.7–6 mm long |
| Nature | persistent | persistent | persistent | soon deciduous | - | |
| Callus hairs | 1/4–1/2 length of lemma | 1/4–1/3 length of lemma | ca. 1/4 length of lemma | 1/10–1/5 length of lemma | ca. 1/2 length of lemma. | |
| Anthers | 1–2 × 0.2–0.5 mm long | 0.8−1.5 mm long | 1–1.8 mm long | 0.7–1.1 mm long | ca. 1 mm long | |
......continued on the next page
Notes
Published as part of Saha, Suparna, Banerjee, Arnab, Dwivedi, Mayank D., Pradhan, Durga K. & Maity, Debabrata, 2024, Novelty in Arundinella (Arundinelleae, Panicoideae, Poaceae): Morphological and Molecular Evidences for a New Species from Sikkim Himalaya, pp. 276-277 in Phytotaxa 647 (3) on page 276, DOI: 10.11646/phytotaxa.647.3.4, http://zenodo.org/record/13215714
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