Oct. 22, 1919] 



New Woody Plants from Mt. Maquilixg 



3099 



RCJBIACEAE 



Plectronia mabesae Elm. n. 



sp. 



An undershrub. 1 m. high. Stems and branches 

 rigid and gray; the twigs brown and when young somewhat 

 pubescent, usually opposite, sometimes ternate. Leaves 

 deciduous, membranous, opposite or in pairs from the 

 end of short branchlets, upon 5 cm. long more or less 

 pubescent petioles, ovately oblong to subelliptic, the 

 smaller ones broadly lanceolate, entire, membranous, 

 paler beneath, the larger ones 8 cm. long by 3.5 cm. 

 wide below the middle, acuminate, base obtusely rounded 

 or broadly cuneate, glabrate, usually with interaxillary 

 setaceously pointed short bracts, the very young twigs 

 subtended by similar bracts, midrib evident and usually 

 puberulent beneath, the 5 pairs of ascendingly curved 

 nerves very fine. Flowers solitary or few clustered, 

 axillary or terminal, upon very short finely hairy stalks 

 which are subtended by short setaceous subpersistent 

 bracteoles whose bases are very broad and somewhat 

 connate, usually appearing with the young leaves, white. 

 3 cm. in length; calyx puberulent, 3 mm. long, broadly 

 tubular, constricted below the 5 apiculate truncate rim: 

 corolla glabrous, slenderly tubular, deeply 5-lobed at the 

 top; segments oblong or ligulate, rotately spreading, 1 

 to 1.5 cm. long, obtuse at the apex; stamens 5. sessile 

 upon the corolla tube just below the throat, glabrous: 

 anthers linear, included, dorsally attached, 3 mm. long: 

 style 6 mm. long, glabrous, the apical deeply cleft por- 

 tion pu I verulent; ovary completely imbedded. Fruit greenish 

 and dry, when old turning brownish, obovoidly globose 

 ultimately glabrous, didymous, 7.5 ram. long, terminated 

 by the calyx vestige which is usually a trifle ciliate. 

 2-celled and as many seeded, the exocarp and especially 

 the cell partition thin. 



Type specimen in flower number 17427. A. A /,. 

 Elmer, Montalban, Province of Rizal, Luzon. March, 1016; 

 in fruit number 294. 0. Mabcsa (Forestry Bureau 26175), 

 Los Bafios, Province of Lftgona, Luzon. August. 1916. 

 The following numbers are referred to this species with 

 certainty: — Bataan province, Luzon, Forestry Bureau 

 numbers 3036, 6631 and 1263 Whitford; Ilocos Norte prov- 

 ince Bureau of Science number 32840; Bengupt province, 

 6405 Elmer: and Antique province, Panay, 5886 and' 5946 

 McGregor. 



Always found at low elevation and in ^tony ground 



