248 NORTH AMERICAN FLORA [Volume 25 



few-flowered; peduncle short or wanting ; fruiting pedicels 4-10 mm. long; drupes 6-7 mm. 

 long. 



Type locality : Colima. 



Distribution : Hot valleys and barrancas of Jalisco and Colima. 



26. Elaphrium lancifolium Schleeht. Linnaea 17 : 247. 1843. 



Bursera land folia Engler, in DC. Monog. Phan. 4: 42. 1883. 



Tcrebinthus lancifolia W. F. Wight ; Rose, Contr. U. S. Nat. Herb. 10 : 120. 1906. 



Young branches glabrous ; leaves glabrous, long-petiolate, pinnate ; rachis not winged ; 

 leaflets 3-7, sessile, lanceolate, acuminate, cuneate at base, crenate, 2.5-7.5 cm. long; 

 racemes short, simple, few-flowered; drupes 7-8 mm. long, glabrous. 



Type locality' : Mexico. 

 Distribution : Probably Vera Cruz. 



27. Elaphrium trijugum (Ramirez) Rose. 



Bursera trijuga Ramirez, Anal. Inst. Med. Nac. 2 : 16. 1896. 

 Terebinlhus trijuga Rose, Contr. U. S. Nac. 2 : Herb. 12 : 279. 1909. 



A shrub or tree ; leaves clustered at the ends of short branches, pinnate ; rachis not 

 winged ; leaflets 7, oblong to lanceolate, serrate, 4-5 cm. long, 8-10 mm. broad; flowers one 

 or few; drupes oblong, 8 mm. long. 



Type locality: District of Ayala, Morelos. 

 Distribution : State of Morelos. 

 Illustration : Anal. Inst. Med. Nac. 2 : pi. 2. 



28. Elaphrium multijugum (Engler) Rose. 



Bursera multijuga Engler, in DC. Monog. Phan. 4: 42. 1883. 

 Terebinlhus multijuga Rose, Contr. U. S. Nat. Herb. 10 : 121. 1906. 



Leaves clustered at the tops of the branches, glabrous ; leaflets 11-35, 2-4 cm. long, elon- 

 gate-lanceolate, somewhat serrate ; panicle 5-6 times shorter than the leaves ; calyx-lobes 1.5 

 mm. long ; petals 5 mm. long. 



Type locality : Colima. 



Distribution : Known only from the type material. 



29. Elaphrium Karwinskii (Engler) Rose. 



Bursera Karwinskii Engler, in DC. Monog. Phan. 4 : 43. 1883. 

 Terebinthus Karwinskii Rose, Contr. U. S. Nat. Herb. 10 : 119. 1906. 



Leaves clustered at the tops of the branches, glabrous ; leaflets 25-31, 1-1.5 cm. long, 

 membranaceous, ovate to elliptic, crenate-serrate ; flowers and fruit not known. 

 Type locality: Toliman, Queretaro. 

 Distribution: Known only from the type locality. 



30. Elaphrium diversifolium Rose. 



Bursera diversi folia Rose, Contr. U. S. Nat. Herb. 5 : 113. 1897. 

 Terebinthus diversifolia Rose, Contr. U. S. Nat. Herb. 10 : 279. 1909. 



A tree 3.6-7.5 m. high ; older branches glabrous, shining, reddish ; younger branches, 

 rachis of leaves, and inflorescence pubescent ; leaflets 4-6 pairs, the lower ones often again 

 pinnate with 3-7 leaflets ; leaflets 25 mm. long or less, ovate or oblong, serrate, obtuse, 

 rarely acute, rounded at base, or the terminal one sometimes cuneate, pubescent and some- 

 what shining above, paler, softly pubescent, and reticulate beneath ; rachis narrowly 

 winged between the leaflets ; inflorescence contracted ; drupes glabrous, 10 mm. long. 



Type locality : Along road from Ocuilapa to Tuxtla, Chiapas. 



Distribution : Chiapas. 



31. Elaphrium collinum (Brand.) Rose. 



Bursera collina Brand. Zoe 5 : 204. 1905. 



Habit unknown ; branches glabrous ; leaves bipinnate, 7-15 cm. long ; rachis of leaves 

 narrowly winged, pubescent; leaflets 5-7, ovate, acuminate, cuneate at base, 1-2.5 cm. 

 long, 4-7 mm. wide, crenately serrate, slightly pubescent ; peduncles 2-6 cm. long; drupes 

 glabrous, 10 mm. long. 



Type locality : Cofradia, Sinaloa. 

 Distribution : Known only from the type locality. 



