664 CONTRIBUTIONS FROM THE NATIONAL HEEBARIUM. 



10. METOPIUM P. Br. Civ. Nat. Hist. Jam. 177. 1756. 



I. Metopium brownei ( Jacq.) Urban, Symb. Antill. 5: 402. 1908. 

 Rhus metopium L. Syst. Nat. ed. 10. 2: 964. 1759. 

 Terebinthus brotvnei Jacq. Enum. PI. Carib. 18. 1760. 

 Veracruz and TucatSn. Greater Antilles. 



Shrub or tree, sometimes 15 meters high, the bark tbin, reddish brown; 

 leaflets 3 to 7, long-petiolulate, suborbicular or obovate, 3 to 8 cm. long, usually 

 rounded at apex, glabrous; flowers small, in large axillary panicles; sepals 5; 

 petals 5, yellowish green ; stamens 5 ; fruit a drupe, orange-yellow, about 1 cm. 

 long ; wood weak, dark brown, its specific gravity about 0.80. " Cochinilla " 

 (Santo Domingo). 



The tree is very poisonous, resembling Rhus radicans in its effects. 



II. MOSQUITOXYLUM Krug & Urb. Notizbl. Bot. Gart. Berlin 1: 78. 1895. 



1. Mosquitoxylum jamaicense Krug & Urb. Notizbl. Bot. Gart. Berlin 1: 78. 

 1895. 



Chiapas. Panama; Jamaica (type locality). 



Tree; leaves alternate, persistent, pinnate; leaflets 11 to 17, petiolulate, 

 obovate-elliptic or obovate-oblong, 5 to 7.5 cm. long, entire, rounded or obtuse 

 at apex, minutely appressed-pilose beneath or glabrate; flowers dioecious, 5- 

 parted, in large panicles; fruit drupelike, somewhat compressed, about 8 mm. 

 long. 



The fruit is described by Urban as capsular, but its dehiscence is not ap- 

 parent in any of the several specimens seen by the writer. In Jamaica the 

 wood, known as " mosquito-wood," is valued for building purposes. 



12. PSEUDOSMODrNGIUM Engl. Bot. Jahrb. Engler 1: 419. 1881. 



Shrubs or small trees; leaves pinnate, the leaflets entire or toothed; flowers 

 small, paniculate or subracemose, dioecious; calyx 5-lobed; petals 5, oblong- 

 ovate, imbricate; stamens 5; fruit a drupe, sessile, compressed, subdidymous 

 or reniform, glabrous. 



Leaflets suborbicular to rounded-ovate or obovate, 1.5 to 4.5 cm. wide. 



Leaflets sessile 1. P. virletii. 



Leaflets on petiolules 1 to 2.5 cm. long 2. P. perniciosum. 



Leaflets lanceolate or linear-lanceolate, 3 to 10 mm. wide. 



Leaflets about 7 pairs 3. P. andrieuxii. 



Leaflets 11 to 15 pairs 4. P. multifolium. 



1. Pseudosmodingium virletii (Baill.) Engl. Bot. Jahrb. Engler 1: 419. 1881. 

 Smodingium virletii Baill. Adansonia 11: 182. 1874. 



Known only from the type locality, in the State of San Luis Potosl. 

 Leaflets 6 pairs, rhombic-obovate, 1.5 to 2 cm. long, rounded at apex ; panicles 

 nearly equaling the leaves; calyx glabrous. 



2. Pseudosmodingium perniciosum (H. B. K.) Engl. Bot. Jahrb. Engler 1: 



420. 1881. 



Rhus perniciosa H. B. K. Nov. Gen. & Sp. 7: 10. 1825. 



Rhus pterocarpus Sess6 & Moc. PI. Nov. Hisp. 47. 1887. 



Michoacftn and Guerrero ; reported from Morelos and Querfitaro ; type from 

 Santa Teresa and Tepecoacuilco, Guerrero, 



Small tree, glabrous throughout; leaflets 9 to 11, 3 to 5.5 cm. long, rounded 

 to abruptly acuminate at apex, pale green; panicles equaling or shorter than 

 the leaves ; petals 1.5 mm. long ; fruit lustrous, about 8 mm. long and 10 mm. 



