Stipa (sect. Regalia)
Creators: name: Zhang, Yue
name: Zhang, Xie-Yong
name: Zhang, Chao
name: Chen, Wen-Li
name: Zhu, Shi-Xin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Stipa

description: Key to the species of Stipa sect. Regalia in China
1. Panicles contracted and panicle branches straight..............................................................................................................................2
- Panicles lax and panicle branches flexuous........................................................................................................................................6
2. Awn column with hairs up to 1 mm long ...........................................................................................................................................3
- Awn column with hairs 1.5–4 mm long .............................................................................................................................................4
3. Ligules of basal leaves 4–6 mm, leaf blades scabrous ..................................................................................................... S. regeliana
- Ligules of basal leaves 0.3–1.6 mm, leaf blades glabrous .................................................................................................. S. dickorei
4. Glumes 9.5–13.5 mm, with 2–3 mm long-pointed; awn 1.5–1.8(1.9) cm .................................................................. S. basiplumosa
- Glumes 6–9 mm; awn (2.1) 2.2–2.7 cm ..............................................................................................................................................5
5. Base of panicles enclosed by uppermost leaf sheaths; leaf sheaths and adaxial surface of blades glabrous or scabrous.................... ................................................................................................................................................................................... S. subsessiliflora
- Panicles exserted from uppermost leaf sheaths; leaf sheaths and adaxial surface of blades hirsutulous........................ S. baxoiensis
6. Adaxial surface of leaf blades smooth, glabrous; panicle branches ascending, without cushion in axils..........................................7
- Adaxial surface of leaf blades scabrid or hairy; panicle branches spreading, with cushion in axils..................................................8
7. Lemma 6.3–8.5 mm long, awn 15–26 mm long................................................................................................... S. aliena var. aliena
- Lemma 9–12 mm long, awn 23–30 mm long............................................................................................. S. aliena var. macrocarpa
8. Leaf sheaths and adaxial surface of leaf blades scabrous....................................................................... S. penicillata var. penicillata
- Leaf sheaths and adaxial surface of leaf blades hirsute............................................................................... S. penicillata var. hirsuta
description: Published as part of Zhang, Yue, Zhang, Xie-Yong, Zhang, Chao, Chen, Wen-Li & Zhu, Shi-Xin, 2023, Stipa baxoiensis (Stipeae, Poaceae), a new species from Qinghai-Tibet Plateau, China, pp. 280-286 in Phytotaxa 597 (4) on pages 284-285, DOI: 10.11646/phytotaxa.597.4.3, http://zenodo.org/record/7958624