254 NORTH AMERICAN FLORA [VOLUME 2 



flowered; pedicels 10-12 mm. long; calyx-lobes narrow, 2 mm. long; drupes obovoid, 

 narrowed at base, 8 mm. long, somewhat flattened; exocarp 2-valved. 



Type locality : Near Guaymas, Sonora. 

 Distribution : Sonora and Sinaloa. 



60. Elaphrium filicifolium (Brand.) Rose. 



Bursera filicifolia Brand. Zoe5: 248. 1908. 



A small tree with dull-grayish bark ; first-year branches cinerous ; leaves pinnate ; 

 rachis winged ; leaflets 9-19, pubescent on both surfaces, nearly orbicular, obtuse, 5-10 

 mm. long; peduncles 1-2-flowered, 2-5 cm. long; pedicels 5-6 mm. long; petals twice as 

 long as the calyx ; drupes 10 mm. long. 



Type locality : Rancho Colorado, Lower California. 

 Distribution : Cape Region of Lower California. 



61. Elaphrium longipedunculatum Rose, sp. nov. 

 A tree ; bark of second-year branches dark-brown, smooth; rachis of leaves narrowly 

 winged, entire; leaflets 5-7, ovate to short-oblong, 1.5-4 cm. long, acute, nearly glabrous 

 above, somewhat hairy beneath, crenate ; peduncles flattened, 3-4 cm. long, bearing 2 or 3 

 fruits; pedicels 10-12 mm. long, somewhat enlarged above; drupes somewhat flattened, 10 

 mm. long, glabrous ; exocarp splitting into 2 valves. 



Type collected near Almoloyas, Oaxaca September, 1906,/. N. Rose &J. S. Rose 11282 (U. S. 

 Nat. Herb. no. 454073). 



62. Elaphrium pannosum (Engler) Rose. 



Bursera pannosa Engler, in DC. Monog. Phan. 4 : 54. 1883. 

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



Probably a tree ; leaves pinnate, 6 cm. long; rachis narrowly winged ; leaflets 9, sessile, 

 oblong, acute at both ends, slightly pubescent above, densely tomentose beneath, entire, or 

 with small teeth, 1.5-2 cm. long, 6-9 mm. broad ; flowers and fruit not known. 



Type locality : Mirador, Vera Cruz. 

 Distribution : Known only from the type locality. 



63. Elaphrium asplenifolium (Brand.) Rose. 



Bursera asplenifolia Brand. Univ. Calif. Publ. Bot. 3 : 382. 1909. 



A shrub or small tree ; young branches pubescent, old branches brownish, glabrate ; 

 leaves pinnate ; rachis winged ; leaflets 15-21, sessile, oblong-elliptic, acute, crenate, 3 cm. 

 long; flowering branches short; pedicels 1-2 mm. long; drupes subglobose, 8 mm. in 

 diameter. 



Type locality : San Luis, Puebla. 



Distribution : Near the borders of Oaxaca and Puebla. 



64. Elaphrium sessiliflorum (Engler) Rose. 



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

 Terebinthus sessiliflora Rose, Contr. IT. S. Nat. Herb. 10 : 122. 1906. 



Probably a tree ; young branches grayish or reddish, tomentose ; leaves pinnate ; rachis 

 winged; leaflets 15-17, oblong-elliptic to elliptic-lanceolate, 5-7.5 cm. long, crenate-serrate ; 

 flowering branches very short ; flowers subsessile ; drupes subglobose, 7 mm. in diameter. 



Type locality : Mexico. 



Distribution : Known only from the type collection. 



65. Elaphrium queretarense Rose, sp. nov. 



A tree, 4-5 m. high; second-year branches brownish or reddish, glabrous; young 

 branches pubescent ; leaves on vigorous shoots alternate, but on short branches clustered 

 near the tips, pinnate ; rachis broadly winged ; leaflets 7-9, lanceolate, 1-3 cm. long, acute, 

 serrate, lighter-colored beneath than above, very pubescent on both surfaces; flowers not 

 seen ; fruiting clusters short and compact, densely tomentose ; persisting calyx-lobes very 

 pubescent ; drupes large, 8-9 mm. long, apiculate, shining. 



Type collected near Queretaro, Mexico, August, 1906,/. N. Rose & Joseph H. Painter 11153 (U. 

 S. Nat. Herb. no. 453938). 



