PHILIPPINE URTICACEAE. 
487 
not appeared in recent collections, and may be represented by some of tire pre- 
ceding, although we have nothing nearly resembling plate 689 of Wight’s leones, 
cited by him. 
1. Laportea decuman a Wedd. in Arch. Mus. Paris 9 (1856) 127. 
2. L. peltata Gaudieh. Bot. Voy. Uran. (1826) 498. 
4. PILEA Lindl. 18 
IvEX TO THE PHILIPPINE SPECIES OF PILEA. 
Leaf-venation pinnate, obscure .-..1 - — 1, P. microphylla 
Leaves distinctly trinerved or triplinerved. 
Prostrate or nearly so: leaves not exceeding 1 cm in length, their margins 
entire or obscurely sinuate.. — IkkK 2. P. JmmiUs 
Erect or at most reclining, leaves longer, the margins serrate or dentate. 
Inflorescences distinctly longer than the corresponding petioles. 
Cystoliths very conspicuous on both surfaces, rendering the nerves glau- 
cescent beneath . — 3. P. benguetensis 
Cystoliths inconspicuous or wanting on upper surface, nerves not glau- 
cescent. 
Leaves chartaceous 4. P. monticola 
Leaves membranaceous — - 5. P. melastomoides 
Inflorescences not or very slightly exceeding the petioles. 
Leaves rigid - .( - - —eB- P- ngida 
Leaves membranaceous. 
Transverse veins between costa and nerves conspicuous, reticulations also 
conspicuous. 
Stipules over 1 cm long 13. P. sylvatica 
Stipules 3 to 5 mm, conspicuous .MS : — 12. P. dataensis 
Stipules shorter, inconspicuous. 
Leaf-bases acute. 
Leaves over 12 cm long 6. P.robinsonii 
Leaves never over 8 cm 9. P. apoensis' 
Leaf-bases obtuse or eordulate L..U— ,.... 8. P. luzonensis 
Transverse veins usually very obscure, reticulations always so. 
Under surface of leaves glaucous „jp. 10. P. intumescens 
Under surface of leaves not glaucous - 11 . P. calcicola 
Of these, the perianth-lobes of the pistillate flowers are subequal only in P. 
Sylvatica, P. dataensis, and sometimes in P. monticola, they are unknown in, 
P. intumescens. 
1. Pi lea microphylla Liebm. Vidensk. SeTsk. Skr. 5 2 (1851) 302. 
Pari'etaria microphylla Linn. Syst. ed. 10 (1759) 1308. 
Pilea muscosa Lindl. Coll. Bot. (1821) pi. 
So very common a weed in at least very many places in the Philippines that it 
is rarely collected; the localities shown on the sheets in this herbarium being in 
the provinces of Pampanga, Rizal (including Manila), Laguna, Tayabas (including 
the island of Polillo), and Albay, all in Luzon, also the islands of Mindanao, Jolo, 
and Palawan. However, it is not* reported either by Blanco or Eernandez-Villar : 
Weddell, in 1869, credited it to the New World only; it is now known also from 
India, Ceylon, the Malay Peninsula, and China. 
18 The name Pilea is antedated by Adicea Raf., but the former is one of the 
nomina conservanda of the Vienna Botanical Congress. 
