265 
Typical Ivipcruia exaUata Bi'ongu. (Cumiiuj 1801, 2411) is a very tall grass 
with broad, Hat leaves, pyramidal, somewhat loose panicles, the flowering racemes 
being born on branchlets of the second or third degree; the primary branches are 
np to 10 or 12 cm. long dividing into secondary branchlets and the secondary into 
tertiary which are the flowering racemes. The structure of the spikelets in both 
tj'pical Imperata cxaliata and the subsp. MerrilUi is identical and the culms 
are hollow in both, but solid in all other species of the genus. The form here 
described is probably one developed in the high mountains. 
POLLINIA Trill. 
Pollinia nuda Trim in Mem. Acad. Petersb. ^"1. 2 (1833) 307; Hack, in DC. 
Monog. Phan. 6 (1889) 178; Rendle in .Tourii. Linn. Soc. Bot. 36 (1904) 350. 
Luzon, Province of Benguet, Pauai (4727 i]lcrriU) November 8, 1905; Mount 
Tonglon (4842 Merrill) November 12, 1905. Tliickets and open places 2,000 to 
2,200 in. Not previously reported from the Philippines. -Japan to the Luchu 
Archipelago, China, northern India, and iSoutli Africa. 
Pollinia imberbis Nees, /3 Willdenowiana Hack. 1. c. 178, forma monostachya 
(Franch. et Sav. ). Pollinia japonica var. monosiacht/a Franch. et Sav. 
ImizoN, Province of Benguet, Pauai (4707 Merrill) November 8, 1905. In open 
thickets at about 2.100 m. The variety from .Japan to southern China, northern 
India and Java, the form from Japan. 
Pollinia irritans Bcnth. FI. Austr. 7 (1878) 525; Hack. I. c. 155. 
IjUZOiX, I’rovince of Benguet, Ambuklao to Daklan (4388 Merrill) October 25, 
1905. In open grass lands at about 1.000 in. l^reviously known only from Aus- 
tralia ( Queensland ) . 
Pollinia argentea Trim var. lagopus Hack, in Govt. Jjali. lAibl. 35 (1900) 79. 
This variety has been re-collected at the type locality. Mount Arayat (4222 
Merrill) September, 1905, and also in Northern Luzon: I’rovince of Benguet, 
Baguio, to Ambuklao (4365 Merrill) October 24, 1905; District of Jjepanto, 
IMount Data (4535 Merrill) November, 1905, ascending to 2,100 in. 
ROTTBOELLIA Limi. f. 
Rottboellia ophiuroides Bentli. var. intermedia Hack. var. nov. 
Differt a typo giuma I supra medium tantum anguste alata, in typo 
a ^ inferiore latius alata, ala sursum dilatata. Vergit ad R. striatam 
jSiees. 
Luzon, Province of Benguet, Bugias (40(37 Merrill) October 28, 1905; Baguio 
(6393 Elmer) May, 1904. Intermediate between K. ophiuroides and R. striata, 
but nearer the former. 
ARTHRAXON Beauv. 
Arthraxon microphyllus Hochst. in Flora 39 (1850) 188; Hack. 1. c. 351, 
var. genuinus Hack. 1. c. 352. 
JjUZON, Province of Benguet, Baguio to Ambuklao (4303 Merrill) October, 
1905; Suyoc to Pauai (4719 Merrill) November 7, 1905; District of Lepanto, 
IMount Data (4485 Merrill) November 4, 1905. On dry and damp banks, 1,800 
to 2,100 m. British India to Burma, Tonkin, Cejdon, and Abyssinia. Not pre- 
viously reported from the Philipppines and not known from Malaya. 
Arthraxon oil laris Beauv., subsp. Langsdorffii Hack. 1. c. 354. 
Luzon, District of Lepanto, INtount Data (4028 Merrill) November 5, 1905. In 
open wet lands at l,fl00 m. .Japan and China. 
