THE FLORA OF INIOTTNT IIALCON. 291 



ARTHROPHYLLUM JJliime. 

 Arthrophyllum sp. 



In forests at 70(J in. alt. (No. 5o!J7), flowers ininiatiire, apparently representing 

 an undescribed species. 



ARALIA l.inn. 



Aralia glauca Merrill n. sp. 



Arbor ad 10 in. alta, I'aiuis raiiiulis foliisque ineriiiibus; I'oliis l)i[)in- 

 natis 40 ad 50 cin. loiigis, pinnis 5-jugatis 20 ad 30 cm. longis; foliolis 

 4 ad 7-Jugatis, oblongo-ovatis, acmninatis G ad 11 cm. longis, subturi 

 pallidis; paniculis tcrminalibus 50 cm. vel ultra longis et latis, ramis 

 elongatis ad 40 cm. longis, ramulis racemose dispositis, 4 ad (J cm. 

 longis; ovario 5-locnlare. 



A spineless tree about 10 m. higb, the branches thickened, the ultimate 

 ones 1.5 to 2 cm. in diameter, lenticellate, striate when dry, glabrous 

 or nearly so, the large bipinnate leaves crowded at the apices of the 

 Ijranches, the inflorescence of several large spreading terminal panicles. 

 Leaves about 50 cm. long, the pinna 5- jugate, opposite, the rachis 

 glabrous terete, enlarged at the nodes which are prominently jointed, the 

 petiole 20 to 25 cm. long, glabrous; pinna3 20 to 30 cm. long, the lowest 

 pair shorter; leaflets 4 to 7-jugate, opposite, oblong-ovate to oblong- 

 lanceolate, glabrous, subcoriaceous, dull, the lower surface glaucous, 6 to 

 11 cm. long, 2 to 4 cm. wide, the base rounded or cordate, gradually 

 narrowed above to the rather prominently acuminate apex, the margins 

 distantly irregularly sinuate-crenate, the teeth frequently apiculate, 

 nerves 5 to G on each side of the midrib, rather prominent beneath ; 

 petiolules 1 to 4 mm. long. Panicles at least 50 cm. long and about as 

 wide, several from the apex of the same branch, the branches racemosely 

 disposed, al)out 40 cm. long, the rachis thick, about 20 cm. long, slightly 

 hirsute, branches slightly ferruginous-pubescent, the branchlets and 

 pedicels rather densely so ; branchlets racemosely disposed, slender, 4 to 

 G cm. long, numerous, each supplied with many scattered lanceolate 

 acuminate bracts or bracteoles 2. to 3 mm. long the flowers umbellately 

 disposed, usually 2 umbels towards the apex of each branchlet and fre- 

 quently solitary flowers in the axils of the upper bracts below the umbels. 

 Umbels 15 to 20-flowered, the pedicels 5 mm. long or less. Flowers 

 (immature) white, petals 1.5 mm. long. Calyx 1.5 mm. long, the lobes 

 5, broadly ovate, acute, 0.3 mm. long. Stamens 5 ; anthers 1 mm. long. 

 Ovary 5-celled; styles 5, free, 1 mm. long. 



In forests at 700 ni. alt. (No. 6177), locally rather abundant and recognizable 

 by being entirely unarmed. 



The very sjjiny Aralia hypolcuca Presl is abundant on recent "slides" on Halcon 

 at an altitude of about 1,800 m. It is widely distributed in the Philippines and 

 has been reduced by Forbes and Hemsley to the very widely distributed Aralui 

 spinosa Linn. 



