Amorphophallus adamsensis L.M.Magtoto, D.G.Mones, K.A.Ballada, C.M.

Amorphophallus adamsensis L.M.Magtoto, D.G.Mones, K.A.Ballada, C.M. View in CoL Austria, R.M.Dizon, W.V.Alangui, A.A.Reginaldo, W.M.Galvan, K.T.Dizon & Hett., sp. nov. — Plate 1 View Plate 1 , 2 View Plate 2

Type: LKD 130 (holo University of the Philippines Baguio Northern Luzon Herbarium), Philippines, Adams , Ilocos Norte,elevation 303 ± 3 m, 27 May 2013 .

Etymology. The species epithet refers to the locality where this species was found.

Tuber depressed globose, 17 cm diam and 10 cm high, fusiform offsets numerous on upper half close to peduncle/petiole base.

1 Department of Biology, College of Science, University of the Philippines Baguio, Baguio City, 2600 The Philippines; corresponding author e-mail: lzel_m@yahoo.com.

2 Department of Mathematics and Computer Science, College of Science, University of the Philippines Baguio, Baguio City, 2600 The Philippines.

3 Von Gimborn Arboretum,Velperengh 13, 3941 BZ Doorn, The Netherlands.

Leaf solitary; petiole 123 cm long, 3 cm diam, background colour dark greyish to purple green, with numerous elliptical light greyish to purple markings with slightly raised to raised margins at lower half and diamond-shaped markings on upper part; lamina 139 cm diam, rachises winged distal from the basal branching, basal parts naked with few petiolulate leaflets; leaflets oval to elongate elliptic, 9.5–24 cm long, 3.5–6 cm in width, long acuminate (acumen 2.5–5 cm long), glossy green above. Inflorescence solitary, long peduncled; peduncle 158 cm long, 3.5 cm diam, green to purplish brown background, having generally elliptic whitish green to whitish purple markings with lighter raised margins; spathe narrow triangular, 53 cm long, 28 cm diam; base strongly convolute, subglobose, with distinct constriction from the lateral-ventral sides distinguishing it from the limb; base outside light green with purplish hue, with scattered irregularly shaped slightly raised whitish green spots; base inside light green with white spots, lower part clothed with purple to brown unbranched finger-like projections; limb 3 times longer than base, adpressed against the appendix, strongly costate at the centre, pale green costa and veins; limb inside purple to brown with white spots, limb outside the same; limb auriculate; spadix sessile, much longer than spathe, 99 cm long; female zone cylindric, 9 cm long, c. 3.5 cm diam, flowers slightly distant; male zone cylindric, 12 cm long, 3 cm diam at the top, flowers distant; appendix narrowly fusiform to narrowly elongate, top subacute, 79 cm long, base with few short shallow ridges, dark reddish purple; ovaries depressed globose, 4 mm diam, 3 mm high, unilocular, basal placentation; style 3 mm long, 1 mm diam, slightly curvate, dark purple; stigma large, deeply 3-lobed, surface white, with numerous thin finger-like projections; fruit with globular base and conical tip, 4 mm high, 3.5 mm diam; pollen bright orange.

Notes — Amorphophallus adamsensis resembles A. dactylifer and A. rostratus ( Table 1) but can be distinguished from both by having much longer leaflets with longer acumen; narrow triangular and much longer spathe, the base of which is clothed inside with purple to brown unbranched finger-like projections; lobed or auriculate limb; and much longer male zone with distant flowers.

In addition, A. adamsensis differs from A. dactylifer by having a longer peduncle, narrower spathe, and a much longer spadix

© 2013 Naturalis Biodiversity Center and appendix; from A. rostratus by having a longer and larger petiole with elliptic markings, a larger lamina with naked basal rachis, much longer and larger oval to elongate elliptic leaflets, arching over limb, a longer and larger female zone, depressed globose ovaries, and longer and larger styles.

Acknowledgement The authors are grateful to the Foundation for the Philippine Environment (FPE) for research funding and for the invaluable help of Dr. Alan Galloway, For. John Rey Callado of the Philippine National Museum,the Botanical Library of the National Herbarium of the Netherlands and their staff, and Claire Hill of IngentaConnect.