266 
Arthraxon ciliaris Bcaiiv., subsj). nudus Hack. 1. c. 350. 
Luzoisr, Province of Benguet, Kabayan (4427 Merrill) October 27, 1905. British 
India. 
Arthraxon ciliaris Beanv. sub.s]). Quartinianus Hack. I. c. 350. 
Luzon, Province of Bengiiet, Bucd River, Birgias and Pauai to Baguio (4272, 
4077, 4704 Merrill) October, November, 1905. British India and tropical Africa. 
ISCHAEMUM Linn. 
Ischaemum arundinaceum P. Muell. var. radicans Black, var. nov. 
Differt a typo (australiensi) culino in parte inferiore decaimbente e 
nodis radicante graciliore, foliis, raeemis, spicnlis minoribns, rliacheos 
articulis breviter ciliatis^ gdiinia I distinctius reticulato-nervosa. 
Luzon, Province of Benguet, Baguio (4204 Merrill.) October 22, 1905. Abundant 
oil banks and slopes in the pine region at about 1,500 in. 
Tlie type of tliis species is a tall, erect grass 1 meter high, somewhat larger 
in all its j’^n'ts than the variety here described, but the structure of the 
spikelets in both is essentially the same. In the type the nerves of glume I 
anastomose only in the upper part. 
Ischaemum Merrillii Black, sp. nov. 
Pereiiiie. Cidnii erecti, graciles, circ. 4 din. alti, terctiuscnli, glaber- 
rimi, innltinodes, nodis plnribns in cnlnii liasi confertis additis 3 snpe- 
rioribns plus minus remotis, summo supra medium culmi sito^ simplices 
vel ramulo foliifero aucti. Vaginae superiores internodiis breviores, 
inferiores iis longiores, subcompressae, superiores subearinatae, secus mar- 
ginem exteriorem et prope os pilis adspersae, ceteram glaberrimae. Ligula 
membranacea ovato-oblonga obtusa in vaginam decurrens, 2.5^ mm. 
longa, nervosa, ciliis parcis longis pilisque dorsalibus vestita. Laminae 
lineari-lanceolatae liasi subito in jietiolum subdistinctum (in foliis in- 
ferioribus 1.5 cm., in superioribus 0.5 cm. longum) angustatae, tenuissime 
acuminatae, 5-8 cm. (summa 1-2 cm.) longae, 6-8 mm. latae, patentes v. 
patentissiinae, rigidulae, virides, utrinque (praesertim subtus) jiilis ten- 
uilius basi tuberculatis parce conspersae, marginibus scabrae, tenuinerves. 
liacemi in apice culmi bini sibi appressi, alter sessilis alter pedunculo 
circ. 5 mm. longo fultus, circ. 5 cm. longi, 4 mm. lati, densiflori ; rhaclieos 
articuli spiculam dimidiam paullo superantes, crassi, trigoni, utroque mar- 
gine pilis brevibus (articulo 3— 4-plo brevioribus) suberectis rigidulis albidis 
ciliati, margine interiore fere rectilinei. Spieulae sessiles obovato-oblongae, 
cum callo 1.5 mm. longo olituso breviter parceque barbato 7 mm. longae, 
2 mm. latae, livide violascentes. Gluma I obtuse bidentula, marginibus 
anguste inflexis, flexuris non alatis, cliartacea, in -J- inferiore subcoriacea, 
praeter nervos flexurales 6-nervis, nervis fere ad apicem productis non 
anastomosantibus, dorso piano saltern superne scaberula; II I^^'" aequans, 
ovata, acute carinata, apice obtusinsculo latere compressa, subcliartacea, 
5-nervis, superne scabra; III quam I paullo brevior, ovato-lanceolata 
acuta hyalina glabra 3-nervis; ejus palga lanceolata acuta, binervis; IV 
III^™ aequans, elliptica, in superiore bifida, glabra, e sinu eniittens 
