Britton : Studies of West Indian plants 341 



3. THE GENUS TEREBINTHUS P. BR. IN 



THE WEST INDIES 



The type species of Tercbintluts P. Br. is Pistacia Simantba L., 

 commonly known as the West Indian birch. A subsequent name 

 for the genus is Bursera Jacq. but, as shown by Dr. J. N. Rose 

 (Contr. U. S. Nat. Herb. 10:11 8), this name is unavailable, because 

 Terelnnthns has priority. Seven species are known to me from the 

 West Indies, two of them here to be described as new ; the Mexi- 

 can species have been listed by Dr. Rose. 



Leaflets broad, ovate, elliptic, or obovate. 

 Leaflets 3-1 1, ovate, acuminate or acute. 



Leaflets thin ; bark exfoliating in thin layers. I. T. Simaruba. 



Leaflets coriaceous ; bark close. 2. T. HoIIickii. 



Leaflets only 1, obovate to elliptic, obtuse. 3. T. simplici folia. 



Leaflets narrow, oblong to lanceolate or oblanceolate. 



Leaflets obtuse at the base. 4. T. glauca. 



Leaflets acute at the base. 



Inflorescence elongated, sometimes as long as the leaves. 



Leaflets 5-1 1, linear-oblong to linear-lanceolate. 5. T. angustata. 

 Leaflets 3-5, oblong to oblanceolate. 6. T. inagumsis. 



Inflorescence short, compact, in fruit not longer than the 

 petioles ; leaflets 1-3. 7. T. Nashii. 



«. Terebixthus Simaruba (L.) W. F. Wight, Contr. U. S. Nat. 



Herb. 10 : 122. 1906. 

 Pistacia Simaruba L. Sp. PI. 1026. 1753. 



Bursera gutmnifera L. Sp. PI. ed. 2,471. 176 



Bursern ^— if era glabra Griseb. Fl. Br. W. I. 173- l8 59- 



ra Albescens Eneder. in DC. Mon. Phan. 4: 40. 



Bursera gummifera 



1883. 



Florida; Bahama 

 Thomas to Grenada ; 



Most of the Jamaica trees have pubescent twigs and leaf-rach- 

 lses ; this hairy race is evidently the typical one, based by Linnaeus 



Jamaica ; Haiti ; Porto Rico ; St. 



Mexico 



//. 



2. Terebinthus HoIIickii sp. nov 



A tree 6 m. high, with trunk 2. 5 dm. in diameter, its bark about 



mm. thick, reddish-gray outside, red inside, close, not peeling 



m P a pery layers. Young twigs stout, pubescent ; leaves 8-12 



* 



