Nepenthes alfredoi

Nepenthes alfredoi

Synonymy

Nepenthes alfredoi V.B.Amoroso & Lagunday in Philippine J. Syst. Biol. 11(2): 15 (-16, fig. 2-3). 2017 sec. Amoroso & al. 2017
    • Type (designated by Amoroso, V.B., Lagunday, N. E., Coritico, F. & Colong, R. D. 20171): Philippines, Mindanao, Mt. Hamiguitan Range Widlife Sanctuary Expansion Site, Barangay Luzon, Gov. Generoso, Davao Oriental (345 m a.s.l.), N 06° 32.420’ E 126° 08.601’, 12.10. 2016, V.B. Amoroso, N.E. Lagunday and F.P. Coritico, holotype CMUH10856, Central Mindanao University Herbarium (CMUH), Musuan, Bukidnon, Philippines.
  • 1. Amoroso, V.B., Lagunday, N. E., Coritico, F. & Colong, R. D. 2017: Nepenthes alfredoi (Caryophyllales, Nepenthaceae), a new species of pitcher plant from Mindanao, Philippines. – Philippine Journal of Systematic Biology 11(2): 14-19

Description

Terrestrial climber 8-12 m tall, scrambling in tall trees 12-30 m tall or on neighboring vegetation, glabrous, terete to triangular in transection, up to 7 mm in diameter; climbing stems with internodes up to 6 cm in length. Hydathodes evenly distributed in the stem, upper and lower leaf surface, midveins, tendrils and pitcher exterior. Leaf blade broadly linear to ovate up to 27 cm long and 4.3 cm wide, obtuse to rounded leaf apex, base deccurent to petiole, with 2 veins running on either side of the midrib. Midvein and leaf margin pubescent, leaf upper surface dark green and light green in the lower surface. Petioles ca. 3 mm wide, ca. 1 mm thick, 2 mm wings on both sides, broadly U-shaped in section, not inrolled, tapering towards the wings. Rolls abaxially upon maturity.
Lower pitchers up to 12 cm tall and 4.5 cm wide in the inflated zone, inflated in the bottom thirds with a distinct hip then becoming cylindrical in the mid-region becoming cylindrical to slightly funnel-shaped towards the opening. Wings up to 0.8 cm wide with entire to sinuate margins and run down the entire trap anterior extending for some distance along the tendril. Wing filamentous fringes are up to 8 mm long filiform ca. 0.5 mm in diameter, triangular base ca. 2 mm long, widest at base ca. 1 mm. The wings and fringes are pubescent. Pitcher opening ovate acuminating towards the lid forming the neck. Tendrils not coiled, up to 16 cm long and 1.5 mm in diameter. Exterior of lower pitchers olive drab green with blotches of garnet/blood red or suffused with ruby red depending on sunlight exposure. Interior of the pitcher is olive drab green. Tendrils and the leaf midribs suffused red.
Peristome teeth are absent with nectar glands in the semilunar depressions between the ribs, with canals emptying into the inner pitcher wall. Peristome cylindrical, ca. 5 mm wide, ribs ca. 0.1 mm wide, 0.1 mm thick, ca. 0.2 mm spaces in between ribs, tapering posteriorly forming a slightly anteriorly inclined neck. Lids ovate, up to 5.3 cm long and 4.1 cm wide, suffused with blood red. The basal upper surface may be covered with wax, may have orbicular to elliptic dark gland-like spots ca. 1 mm in diameter. Triangular lid appendage is basal, up to 4 x 7 mm, tapering towards the apex, well-developed lid appendage rounded apex curve posteriorly toward the lid base. Nectar glands ca. 0.2 mm are evenly distributed in the lid’s lower surface including the appendage, elliptic in the centre and orbicular elsewhere. Lid spur filiform, pubescent and mostly unbranched, may be covered with wax, up to 1.2 cm long and up to 1 mm in diameter.
Upper pitchers up to 19 cm tall and 8 cm wide, funnel-shaped and slightly inflated in the bottom third with a distinct hip and tapering posteriorly towards the tendril, cylindrical mid-region, slightly funnel-shaped towards the opening. Wings up to 0.8 cm wide with entire to sinuate margin and running down the entire trap anterior, extending for some distance along the tendril, filamentous fringes up to 0.7 cm long. Tendril coiling and terete in cross section. Peristome occasionally with slightly elevated anterior. Lid and peristome morphology consistent with lower pitchers, mostly olive drab.
Male inflorescence a raceme up to 41 cm long, pubescent, bracts filliform up to 3 mm long, ca. 0.2 mm in diameter, partial peduncles bearing two flowers up to 6 mm long and 1 mm in diameter, pedicels up to 10 mm and 0.2 in diameter. Occasionally one flowered towards apex of the inflorescence. Petals tetramerous, ovate, up to 3 x 2.5 mm with orbicular to elongated nectar glands ca. 0.1 x 0.2 mm in the upper surface. Androphore are 2 mm long and 0.5 mm in diameter, anther-head subglobose 1 mm in diameter. Pollen in tetrads.
Female inflorescence is a raceme up to 40 cm long. Bracts absent, pubescent, partial peduncles up to 5-10 mm long, 1 mm in diameter, shortest at the apex, pedicels 4-10 mm long, 0.5 mm in diameter, shortest at the apex. Flowers without partial peduncles have pedicels that are 4-15 mm long ca. 0.2 mm in diameter, shortest at the apex. Bearing tetramerous narrow ovate petals 3 x 2 mm with orbicular to elongated nectar glands ca. 0.1 x 0.2 mm on the upper surface. Capsule bearing the seeds up to 2 cm long and 0.4 cm wide. Seeds filiform, appendages up to 1.2 cm long.A

Conservation

Critically Endangered [CR B1ab (i)] (IUCN 2016); extent of occurrence estimated to be less than 10 km². A

Distribution (General)

Philippines, Mindanao, along the ultramafic ridges of Brgy. Luzon, Gov. Generoso, Davao Oriental in the Mt. Hamiguitan rangeA

Etymology

The specific epithet honors Alfredo Bolante Sr. “Pidoy”, a forest guard and well-trained local researcher of MHRWS who first observed and collected the new species described herein.A

Habitat

Lowland mixed dipterocarp forest at 175-345 m a.s.l. A

Bibliography

A. Amoroso, V.B., Lagunday, N. E., Coritico, F. & Colong, R. D. 2017: Nepenthes alfredoi (Caryophyllales, Nepenthaceae), a new species of pitcher plant from Mindanao, Philippines. – Philippine Journal of Systematic Biology 11(2): 14-19

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
Philippines, Mindanao, Mt. Hamiguitan Range Widlife Sanctuary Expansion Site, Barangay Luzon, Gov. Generoso, Davao Oriental (345 m a.s.l.), N 06° 32.420’ E 126° 08.601’, 12.10. 2016, V.B. Amoroso, N.E. Lagunday and F.P. Coritico, holotype CMUH10856, Central Mindanao University Herbarium (CMUH), Musuan, Bukidnon, Philippines.
Citation: No Citation available. This specimen either has no or multiple field units.