Part 3, 1911] BURSERACEAE 255 



66. Elaphrium submoniliforme (Engler) L,. Marchand (; Engler, 

 in DC. Monog. Phan. 4: 55, as synonym. 1883). 



Bursera submonffiformis Engler, in DC. Monog. Phan. 4: 55. 1883. 

 Terebinthus submbniliformis Rose, Contr. U. S. Nat. Herb. 10 : 122. 1906. 



Probably a tree; old branches reddish-brown, glabrous; young branches doubtless 

 hairj- ; leaves 6-S cm. long, clustered at the ends of short branches ; rachis narrowly winged ; 

 leaflets 7-13, sessile, oblong, crenate-serrate, densely tomentose on both surfaces, 1-2.5 cm. 

 long, acute; inflorescence much shorter than the leaves, many-flowered ; pedicels slender, 

 tomentose ; calyx-lobes linear, obtuse, 4 mm. long ; petals oblong ; drupes globular, 8 mm. in 

 diameter, pubescent. 



Type locality : Rio Vuellas, Oaxaca. 

 Distribution : Hot valleys of Oaxaca. 



67. Elaphrium Palmeri (S. Wats.) Rose. 



Bursera Palmeri S. Wats. Proc. Am. Acad. 22: 402. 1887. 

 Tercbinlhus Palmeri Rose, Contr. U. S. Nat. Herb. 10 : 121. 1906. 



A shrub or small tree, with smooth reddish bark ; young branches densely pubescent ; 

 leaves pinnate ; rachis broadly winged, toothed ; leaflets 7-11, lanceolate, acute or acuminate, 

 2.5-5 cm. long, densely pubescent on both surfaces, but especially so beneath; peduncles 

 short or none; pedicels 4-8 mm. long; drupes ovoid, acute, glabrous, Smm. long. 



Type locality' : In a deep canyon, Rio Blanco, near Guadalajara, Jalisco. 

 Distribution : Durango to Guatemala. 



68. Elaphrium Aloexylon Schiede, Linnaea 17 : 252. 1843. 



? Atnyris Linaloe Llave, Reg. Trim. 1 : 356. 2. 



Bursera Aloexylon Engler, in DC. Monog. Phan. 4: 52. 1883. 



Tercbinlhus Aloexylon W. F. Wight; Rose, Contr. U. S. Nat. Herb. 10: 118. 1906. 



Young branches glabrous ; leaves pinnate ; rachis narrowly winged ; leaflets 5-7, mem- 

 branaceous, obtuse, coarsely crenate, above shortly pilose and shining, tomentose beneath, 

 1.5-2 cm. long; inflorescence shorter than the leaves, 3 cm. long; fruiting pedicels 1-1.5 

 cm. long; drupes 6-7 mm. long. 



Type locality - ; Real de Huautla [Cuautla], Morelos. 

 Distribution : Vera Cruz (?) to Morelos. 



69. Elaphrium rhoifolium Benth. Bot. Voy. Sulph. 10. 1844. 



Elaphrium Hindsianum Benth. Bot. Voy. Sulph. 11. 1844. 

 Bursera Hindsiana Engler, in DC. Monog. Phan. 4: 58. 1883. 

 Bursera Hindsiana rhoifolia Engler, in DC. Monog. Phan. 4: 59. 1883. 

 Terebinthus rhoifolia Rose, Contr. U. S. Nat. Herb. 10 : 121. 1906. 



A small tree; leaves simple or 3-foliolate, the blades oval to short-oblong, strongly 

 crenate, pubescent on both surfaces ; inflorescence shorter than the leaves ; peduncles 

 short, pilose ; drupes 1 or 2, globular, glabrous. 



Type locality : Near the Bay of Magdalena, Lower California. 

 Distribution : Southern Lower California. 

 Illustration : Benth. Bot. Voy. Sulph. pi. 7, S. 



70. Elaphrium MacDougalii Rose. 



Terebinthus Macdougalii Rose, Torreya 6: 170. 1906. 



A small tree ; bark of one- and two-year-old branches reddish, smooth ; leaves clus- 

 tered at the ends of short spurs, either simple or with 3-5 leaflets ; rachis of compound 

 leaves winged; petioles short; blades oblong, obtuse, 1-1.5 cm. long, crenately toothed, 

 with a very short, dense pubescence on both surfaces ; staminate flowers borne in short 

 racemes or panicles ; calyx-lobes and petals densely pubescent ; pistillate flowers solitary ; 

 peduncles very short, 4 mm. long, glabrous ; drupes 7 mm. long ; naked part of pyrene light- 

 colored. 



Ty'pe locality : Probably near the mouth of the Colorado River. 

 Distribution : Northern Lower California. 

 Illustration: Torreya 6: 170. /. 5. 



