PHILIPPINE URTICACEAE. 13 
16. PIPTURU8 Wedd. 
TO THE PHILIPPINE SPECIES OF PIPTURrS. 
Stipules free J glomerules axillary, rarely also spicate. 
Leaves long-petioled except on small branchlets or reduced plants, their 
margins entire or more often coarsely dentate 1. P. arborescens 
Leaves short-petioled, their margins regularly finely serrate 
2. P. mindanaensis 
Stipules united for about half their length, free at the apices; glomerules spicate, 
rarely also axillary. 
Both surfaces of leaf nearly same color; spikes usually solitary. 
Leaves elliptic or oblong to oval or obovate, abruptly acuminate 
3. P. repandus 
Leaves narrowly elliptic or narrowly oblong, gradually acuminate 
4. P. succulentus 
Under surface of leaf white-tomentose. 
Spikes usually fascicled; leaves coriaceous, oval or narrowly oval; woody 
vine - - 5. P. discolor 
Spikes usually solitary; leaves thinner, ovate to lanceolate; tree 
6. P. argentcus 
1. Pipturus arborescens comb. nov. 
Uriica arborescens Link Enum. Hort. Berol. 2 (1822) 386; Blanco Fl, Filip. 
ed. 2 (1845) 483; Naves in Blanco FL Filip. ed. 3 (1877) pi. 311, 
Urtica haccifera Blanco Fl. Filip. (1837) 695, non Linn. Sp. PL ed. 2 (1763) 
1398. 
Pipturus asper Wedd, in Ann. Sci. Nat. Bot. IV 1 (1854) 197. 
Batanes Islands, Batan Island, For, Bur. 15295 Agudo. Babuyanes Islands, 
Camiguin Island, Bur. Sci, 3093 Fenix; Dalupiri, Bur. Sci. 10101 McGregor. 
Luzon, Province of Ilocos Norte, Pasuquin, For. Bur. 13S05, 13821 Merritt <^ 
Darling: Province of Ilocos Sur, Baranas River, For. Bur. 1^082 Meiritt d Dar- 
ling: District of Bontoc, For. Bur. 10914 Curran, VaTWverhergh 125, 189, 751: 
District of Lepanto, Balbalasan, For. Bur. 5691 Klcmme: Province of Benguet, 
Mount Pulog, For. Bur. 18119, 18210 Curran, Merritt, d ZscJioJcke; Sugpan, For. 
Bur. 14102 Merritt & Darling; Bagnio, Williams 1013, Elmer 8489, SI46: Prov- 
ince of Union, Bauang, Elmer 5615: Province of Pangasinan, Agno, Bur. Sci. 4839 
Ramos: Province of Bulacan, Norzagaray, Yoder I4I : Province of Bataan,IT7n7- 
ford 12, For. Bur. 2222 Meyer, Williams 325: Province of Rizal, Bosoboso, Merr. 
Dec. Phil For. Fl. 214 Ahern's collector; Antipolo, Merrill 1631, Phil. PI. 366 
Ramos; Pateros, Bur. Sci. 9568 Robinson; Manila, Cuming 124, Aherrv 112, Mer- 
Hll 96, 98, Elmer 5509, Phil Norm. Sch. 44> 152, 4S8, 4^^ ■' Province of Laguna, 
Los Banos, Eallier s. n., Elmer s. n.: Province of Batangas, Lipa, Phil. :Sorm, 
Sch. 351: Province of Tayabas, Atimonan, Gregory 36; San Isidro, For. Bur. 
5689 Kohbe: Province of Camarines, Pasacao, Ahem 154. ^Iindoko, Merrill 
1221; Pola, Merrill 2241; Macaulig, For. Bur. 5362 Merritt; Aglubang River, For. 
Bur. 1202s Merritt; Bongabong River, For. Bur. 3123 Merritt. Negbos, Himu- 
gaan River, Whitford 1635; Cadiz, Bur. Sci. 1343 Celestino; Talisay, For. Bur. 
15115 Tanosa; Luzuriaga, Bttr. Sci. 9941 Robinson. Cebu, Toledo, Bur. Sci. 1183 
McGregor. Mindanao, Province of Surigao, Ahem 665: Lake Lanao, Camp Keith- 
ley, Mrs. Clemens 240: District of Zamboanga, Lunsugan, Ahem 619: District of 
Cotabato, Bur. Sci. 11559 Robinson. Basilan, Isabela, Bur. Sci^ 99S2 Robinson. 
Palawan, Puerto Princesa, Bur, Sci. 2fi6 Bermejo; Canina River, Bur. Sci. 169 
Foxworthy. 
Ynriable in the size, shape, and pubescence of the leaves. Tlie Palawan col- 
