Bambusa eutuldoides
Bambusa eutuldoides McClure, Lingnan Univ. Sci. Bull. No. 9, 1940: 8.
Thai name: ไผ่ตาใหญ่ (phai ta yai).
Chinese name: 大眼竹 (da yan zhu).
Distribution: THAILAND: The occurrence of cultivated plants of this species in Thailand has not yet been confirmed. There is only one known introduction from the USA in 2009 that could represent this species. — CHINA (South): Guangdong, Guangxi; usually cultivated along river banks and around villages.
Description: "Culms 6–12 m, 4–6 cm in diam., basally straight, apically slightly drooping; internodes 30–40 cm, fistulose, initially thinly white powdery, sometimes sparsely deciduously stiffly hairy below nodes; wall ca. 5 mm thick; nodes slightly prominent, basal several with rings of gray-white silky hairs below and above sheath scar; branching from 2nd or 3rd node up. Branches several or many, clustered, central 3 dominant. Culm sheaths deciduous, triangular to narrowly triangular, leathery, glabrous or sometimes very sparsely stiffly strigose, apex long slanted along one side, extremely asymmetrical, arched; auricles extremely asymmetrical, of various shapes, rigid, wrinkled; larger auricle extremely decurrent, oblanceolate to narrowly oblong, 5–6.5 × ca. 1.5 cm; smaller auricle suborbicular or oblong, ca. 1 cm in diam., or sometimes thoroughly joined to blade base; oral setae undulate; ligule 3–5 mm, irregularly dentate or laciniate, shortly fimbriate; blade deciduous, erect, asymmetrical, triangular to narrowly triangular, base slightly narrowed and then extending outward to join auricles, nearly 3/5 width of sheath apex, abaxially sparsely stiffly deciduous-hairy. Leaf blade abaxially green, lanceolate to broadly lanceolate, usually 12–25 × 1.4–2.5 cm, abaxially densely pubescent, adaxially glabrous. … [flowers and seeds described]." — Flora of China [#1303].
Images: Line drawing in Flora of China [#1303]. Photos in plantjdx.com (culms, foliage) [#1345].
Comments: Two varieties of Bambusa eutuldoides exist, but no records of their introduction into Thailand are known: (a) Bambusa eutuldoides var. basistriata, syn. Bambusa eutuldoides 'Viridivittata inversa'; lower culm internodes green with cream to yellowish-white narrow stripes; photo in iask.sina.com (culm); (b) Bambusa eutuldoides var. viridivittata, syn. Bambusa eutuldoides 'Viridivittata'; Asian Lemon Bamboo, China Lemon Bamboo; culm internodes peach and pink toned with green stripes when young, maturing to lemon yellow with green stripes; foliage leaf blades green with occasional yellowish stripes; photos in AsianFlora (culms, shoot) [#1332]; BambooWeb.info [#1340]; BambooCraft.net [#1341]; video on YouTube.
Bambusa cf. eutuldoides
Specimen: BS-0258 [C4] (living plant), received as "Bambusa eutuldoides" from cultivated stock from the USA, Sep. 2009.
Characteristics: Habit a moderately dense clump. Culms up to 7 m long by 2.3 cm in diameter, erect, straight, bending outwards. Young shoots emerge from April to August. Culm-internodes 33–48 cm long, uniformly green, initially white farinose, distally scattered short dark hairy, otherwise glabrous, moderately thick-walled (wall 0.5 cm by 2.0 cm in diameter at 1 m height from the ground), basal internodes almost solid. Culm-nodes branched from the lower culm up. Culm-leaves deciduous. Culm-leaf sheath apex asymmetrically rounded. Culm-leaf auricles unequal. Culm-leaf blade two-thirds as long as the sheath, erect, triangular; blade base asymmetrical; persistent or late caducous.
Uses: Culms for farm appliances and for building farmhouses; plants for low to medium-sized hedges and screens.
Cultivation requirements: Easy-growing; in full sun, or temporarily in light shade, soil normal moisture-retentive to moist with good drainage.
"Bambusa eutuldoides" (BS-0258): Section of internode with culm-leaf