Gigantochloa parviflora

Synonym: Oxytenanthera parviflora Keng f., Acta Phytotax. Sin. 6, 1957: 358; type: Yunnan, June 1936, C. W. Wang 75259.

Thai names: ไผ่คะมะ (phai khama) (Loei); ไผ่ล้อ (phai lo) (Nan) — Mu Chakkrapong, pers. comm., Facebook, 15 and 21 Oct. 2021.

Chinese name: 南峤滇竹 (nán jiào diān zhú).

Distribution: THAILAND (North and North-East): Nan Province: อุทยานแห่งชาติดอยภูคา (Doi Phu Kha National Park), wild; Loei Province: in the forest, wild (according to Mu Chakkrapong, pers. comm., Facebook, 15 Oct. 2021). — LAOS: Possibly occurring in areas bordering Nan and Loei of Thailand. — CHINA (South): southern Yunnan, in river valleys at ca. 1,400 m altitude.

Culm size: Height 8–15 m, diameter 5–10 cm.

Descriptions:

(1) "Habit: Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; woody. Culm-internodes terete; thin-walled. Lateral branches dendroid. Branch complement many. Leaves 8 per branch. Leaf-sheaths 7 cm long; glabrous on surface. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 3 mm long; truncate. Collar with external ligule. Leaf-blade base cuneate, or broadly rounded; with a brief petiole-like connection to sheath; petiole 0.3 cm long. Leaf-blades lanceolate, or oblong; 16-28 cm long; 35-40 mm wide; light green and glaucous; discolorous with last colour beneath. Leaf-blade venation with 14-16 secondary veins. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate." [Flowers and seeds described]. — KewScience POWO [#1305], accessed 21 Oct. 2021.

(2) "Culms and culm sheaths unknown. Leaf sheath ligule truncate, ca. 3.5 mm; blade 16–28 × 3.5–4 cm. … [flowers described, seeds unknown]." — Flora of China [#1303], accessed 21 Oct. 2021.

Images: Line drawing in Flora of China [#1303].

Comments: A description and images of the Thai specimens have not yet been published by Mu Chakkrapong (21 Oct. 2021).