Nepenthes krabiensis

Nepenthes krabiensis

Synonymy

Nepenthes krabiensis Nuanlaong, Onsanit, Chusangr. & Suran in Thai Forest Bull., Bot. 44(2): 128 (-133, fig. 1-3). 2016 sec. Nuanlaong & al. 2016
    • Type: Thailand, Krabi Province, Khlong Thom District, Mt Nor Ju Jee, 600–700m, 7°54’1.50”N, 99°18’15.90”E, ♂ fl. lower and upper pitchers, 29 July 2015, Nuanlaong 01464 (holotype Herbarium of Walailak University; isotype BKF).

Description

Dioecious, glossy climbing herb, stems terete, 1.5–2.5 m long, 3.5–5 mm diam.; internodes 1.7–2.7 cm long; axillary buds present in the upper part of plant; green as the upper and brown as the lower. Indumentum of brown hairs, 0.1–0.2 mm long, present on leaf axils, tendrils, outer surface of pitchers, peduncles, rachis, sepals, androphore, and ovary; more inconspicuous on midrib (only 0.02–0.06 mm long); absent on lamina. Leaves glossy light-green in a rosette when young, green when mature; emerging from an orange-brown triangle lateral bud at the base of the midrib near the leaf attachment; coriaceous, lanceolate, apex acute, clasping the stem by three quarters of its circumference, decurrent for 1.4–2 cm of its length; pseudo-petiolate, alternate, dilating at the node, 2.2–4.2 × 12.4–19.3 cm, projecting along the stem as wings; longitudinal nerves 2–3 on each side of the midrib in outer third of lamina, inconspicuous pinnate nerves; midrib conspicuous; tendrils straight, terete, 2.0–2.5 mm diam., 10.5–15 cm long in lower pitchers and 1.5–2.5 mm diam., 8.0–11.5 cm long in upper pitchers, coiling. Lower pitchers green to orange with red stripes outside, red blotches over the inside, absent in glandular zone; green to orange or red peristome; lid green to red on the upper surface, green to yellow or orange on the lower surface, ca 3.5–5.2 × 12.1–19.5 cm; 50 to 60% ovate at the lower with digestive glandular at the inner surface, narrowing at the upper; conspicuous midsection hip with two fringed wings as 3–6 mm long, serrate to double serrate, along the length of the pitcher, 4.5–11 cm or run down ventral exterior surface from mouth to tendril, fringe elements 6–9 mm long; oblique ovate pitcher mouth rising toward the lid; peristome cylindrical or flattened, 1.0–1.6 cm wide, inner edge with teeth 0.5–1 mm, ridges 0.05 mm apart; broadly ovate lid, 3.6–5.3 × 3.7–6 cm, larger than mouth, sometime vaulted or bent towards the mouth, base cordate 2–4 mm, may or may not have appendage as a lower surface (14% vs. 86%, respectively); nectar glands numerous, elliptic, 0.25 mm diam. along the midrib, and with crateriform glands 0.13 mm diam. scattered over the lower surface of the lid; spur filiform, 3–8 mm long, with no branches. Upper pitchers light green, with red blotches over the inner surface, absent in glandular zone; peristome white, green to white or light green; lid light green; tendrils coiled; tubulose or narrowly to infundibular, 12–19 × 2–3 cm; hip comprising one third of the lower part; wings absent but with two conspicuous ribs from the mouth toward the tendrils; pitcher mouth ovate, less oblique than lower pitcher; peristome cylindrical to flattened, slightly raised at the front to form a triangular point, 0.5–1 cm wide, inner edge with teeth 0.5–1 mm, ridges 0.05 mm apart; lid broadly ovate, 3.6–5.3 × 3.7–6 cm, base cordate 2–4 mm, appendages absent; nectar glands similar to the lower pitcher; spur filiform, 1.5–5 mm long, no branches. Male inflorescences racemose, 58.6–62 cm long; petals green when young, red when old; peduncle 32–37 cm long, 2–4 mm diam., rachis 26.5–30 cm long; flowers 97–130, singly arranged, occasionally with 2-flowered partial peduncles, pedicels 0.9–1 cm long, bracts 3–4 mm long, present at the base or on the lower half of pedicel; flowers actinomorphic; tepals 4, ovate, 2.0–2.5 × 3.0–3.5 mm, cruciferous, valvate, densely covered with circular to elliptic nectarioles 0.01–0.02 mm diam.; androphore 4 mm long, anthers basifixed, anther head globular, 1.5–2.5 mm diam., anthers with 15–22 cells, dehiscence longitudinal; pollen in tetrads. Female inflorescences racemose, 47–63 cm long; green when young, green to yellow when old; peduncle 35.5–52 cm long, 2.5–4 mm diam., rachis 11.5–27.5 cm long; solitary flowers ca. 28–56 arise on pedicles, 0.7–1.2 cm long; bract absent; actinomorphic flower, tepals as males except: elliptic, 1.5–2 × 3.0–3.5 mm, nectarioles 0.01–0.03 mm diam.; stigma 2.0–2.5 mm diam.; ovary oblong, 4.5–6 mm long, superior with four syncarpous carpels; placentation axile. Infructescence similar to female inflorescence; sepals persistent; four valves, 1.4–2 cm long with septicidal capsule; seeds narrowly ovate, 3–5 mm long; 87–118 seeds per fruit.A

Distribution (General)

Southern Thailand, found only at Khao Pra-Bang Khram Wildlife Sanctuary, Krabi Province, ThailandA

Habitat

On summit areas, in sandy or mool soil, often growing in limestone rock crevices, at 600–700 m above sea level.A

Bibliography

A. Nuanlaong, S., Onsanit, S., Chusangrach, V. & Suraninpong, P. 2016: A new species of Nepenthes (Nepenthaceae) from Thailand. – Thai Forest Bull., Bot. 44(2): 128-133

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
Thailand, Krabi Province, Khlong Thom District, Mt Nor Ju Jee, 600–700m, 7°54’1.50”N, 99°18’15.90”E, ♂ fl. lower and upper pitchers, 29 July 2015, Nuanlaong 01464 (holotype Herbarium of Walailak University; isotype BKF).
Citation: No Citation available. This specimen either has no or multiple field units.