ee eS |e eC ee 
PHILIPPINE URTICACEAE. 487 
not appeared in recent collections, and may be represented by some of the pre- 
ceding, although we have nothing nearly resembling plate 689 of Wight’s Icones, 
cited by him, 
1, LAPORTEA DECUMANA Wedd. in Arch. Mus. Paris 9 (1856) 127, 
» 2. L. penrata Gaudich. Bot. Voy. Uran. (1826) 498. 
4, PILEA Lindl."8 
KEY TO THE PHILIPPINE SPECIES OF PILEA, 
Leaf-venation pinnate, obscure 200. eco ee oeeeeee eee 1. P. microphylla 
Leaves distinctly trinerved or triplinerved. 
Prostrate or nearly so: leaves not exceeding 1 em in length, their margins 
entire or obscurely sinuiate 20... cececcccecccececceeceeeseeeeeeecccece 2. P. humilis 
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- 
coscent DAGAGUR 9.........cicw Ree 3. P. benguetensis 
Cystoliths inconspicuous or wanting on upper surface, nerves not glau- 
cescent, 
Leaves chartaceous nota cone cha nnd, aeRs ane RRee Cat MMD AN GE's cos oduacauennsecadsas.s 4. P. monticola 
Leaves membranaceous ...0......cccsccscsecealeccseereessossneressessseeee 5. P. melastomoides 
Inflorescences not or very slightly exceeding the petioles. 
2 (| Ga a neoner >. kre i el 7. P. rigida 
Leaves membranaceous. 
Transverse veins between costa and nerves conspicuous, reticulations also 
conspicuous, — 
Stipules over] cm long. .cteteacuse 13. P. sylvatica 
Stipules 3 to 5 mm, conspicuous... co.cc 12. P. dataensis 
Stipules shorter, inconspicuous. 
Leaf-bases acute. 
Leaves over 12 em long.........2....--.... desta lbas Rg: gees 6. P. robinsonii 
Leaves mever over 8 ciphictse gesciiag sec secs ccca-cscccocsssecceceecoece 9. P. apoensis 
Leaf-bases obtuse or cordulate............cccccccccccecccecoececeeeeee 8. P. luzonensis 
‘Transverse veins usually very obscure, reticulations always so. 
Under surface of leaves glaucous... 10. P. intumescens 
Under surface of leaves not glaucous......0.00...00.00..... 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. 
¢e 
l. Pilea microphylla Liebm. Vidensk. Selsk. Skr. 52 (1851) 302. 
Parietaria microphylla Linn. Syst. ed. 10 (1759) 1308. 
Pilea muscosa Lindl. Coll. Bot. (1821) pl. 4. 
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 Fernandez-Villar: 
Weddell, in 1869, credited it to the New World only; it is now known also from 
India, Ceylon, the Malay Peninsula, and China. 
*The name Pilea is antedated by Adicea Raf., but the former is one of the 
nomina conservanda of the Vienna Botanical Congress. 
