+ 
PHILIPPINE URTICACEAE, 
Distribution of Urticaceae in the Philippines, ete.—Continued. 
a =| 
Genus. oat Arch China. Ri a wg 
| | 
| | | 
Potkiloupermaun ina. 25-2 --22222 2a ese meee S 1 |--------|----—--| ------=- 
POuedleine cere ta. ate ee eens 5 4 | 4 2 4 | 
PEGCHiNce ee bo ae eel Z 4 | 1 1 4 
BETCOGH INANE en. t2 edo eee eee 1 Ths] oO | een ee 
SINS ED oe oe See ee eel eee | ee 1 Wee Rk oi Pee 
ST OOO a ae a | oe epee | Se es | 1 pete a (ea 
Sinn [eee Ge he 8 ee el ee ee | 3 1 | 9 1 | 1 
Dein tpecios.- 2... | #118} 3151] 498] 687 | 129 
WOU ONOIAL ws. co S2-cascencs- | 23 24 21 16 21 
Some of these differences are doubtless due to the more radical or 
more conservative tendencies of the workers: ultimately, there is every 
probability that the Malay Archipelago will be found far to excel all of the 
other regions here enumerated in the number of its species. ‘The above 
distribution of the Malay species between Hlatostema, Hlatostematoides, 
and Pellionia is very rough: in many cases, the descriptions are quite 
insufficient to enable an accurate opinion to be formed. 
Taken as a whole, the affinities of Philippine Urticaceae are undoubt- 
edly Malayan, only one genus found here being unreported from the 
Malay Islands. This is Chamabainia, which is known from India and 
China. Of the other genera, Urtica is cosmopolitan, but the only species 
here is Malayan: Laportea occurs in all the continents except Europe, 
and some of our species have their closest alliance with those of India, 
but more with those of Malaya: Pilea and Boehmeria are tropical or 
subtropical, in the former is the one species which can positively be said 
to be introduced only, P. microphylla (inn.) Liebm.: another species 
here described as P. humilis, is very closely allied to P. peploides, which 
ranges from the Galapagos Islands across Oceania and Asia to western 
Africa ; the affinities of the other species are with those of India, Formosa 
or Malaya. Boehmeria nivea (Linn.) Gaudich. is doubtless introduced, 
but the forms from Sabtan Island seem to fall under the variety tena- 
cissima, whose other distribution is such that it may well be indigenous: 
the other species show alliances with those of India, Malaya, and Formosa. 
Two other genera are found in the Tropics of both America and the 
* Hook. f. Fl. Br. Ind. 5 (1888) 477, 547-594. 
8 Boerl. Handl. Kenn. Fl. Ned. Ind. 3 (1900) 372-381: Schum. & Lauterb. 
Nachtr. Fl. Deutsch, Schutz. Siidsee (1905) 251-256: with some changes. 
‘Forbes & Hemsl. in Journ. Linn. Soc. Bot. 26 (1899) 471-492, 36 (1905) 
461, 481, 488, 501, 516, 527, 529. 
5 Kawakami List Pl. Formosa (1910) 103-108. 
