314 
(including peduncle) often 25 to 38 mm, long; fruit 6 mm. in diameter; nutlet 
orange, spherical. 
This species seems to be clearly distinct from B. palmeri. The latter species has 
recently been collected near Manzanillo and in Guatemala. These specimens, 
although from widely separated regions, do not show much variation from the type. 
Mr. Nelson’s specimens vary little from Dr, Watson’s variety glabrescens, and we feel 
justified in separating it specifically from B. palmeri. It differs especially from the 
latter in its darker bark, in the shape, size, number, pubescence, and texture of the 
leaflets, and apparently in having smaller fruit. 
The type is deposited in Gray herbarium, duplicate type in National Herbarium. 
It was collected by Mr. C. G. Pringle on the rocky bluffs of the Rio Grande de 
Santiago, near Guadalajara, in October, 1889 (No. 2336). Mr. Nelson’s plant (No. 
2031) was collected along roadside between Sochi and Tlalquesala, State of Guer- 
rero, altitude 3,600 to 4,800 feet, November 29, 1894. 
Bursera jonesii Rose, sp. nov. 
_Small shrub with slender, grayish branches; leaves simple, oval to obovate, 
rounded or slightly indented at apex, broadly cuneate at base, entire, 3 cm, or less 
long; flowers solitary on short, retlexed pedicels; fruit oval, 5 mm. in diameter. 
Collected by Mr. Mareus E. Jones, near the city of Colima, July 2, 1892 (No. 73). 
Mr. Jones says that the plant resembles Rhamnus erocea. 
Bursera nelsoni Rose, sp. nov. 
Leaves imparipinnate; leaflets 5 to 9, oblong to ovate, 8 to 16 mm. long, obtuse, 
rounded at base (the terminal one cuneate at base), crenately toothed above the 
middle, glabrous and shining above, strongly reticulated and nearly glabrous 
beneath; rachis 3.6 to 5 em. long, silky-pubescent especially below, narrowly winged 
between the leaflets; fruit solitary on long slender peduncles 16 mm, long, obovate, 
obtuse, 8 mum. long. 
Atlixco, Puebla, Mexico, Collected by Mr. E. W. Nelson, July 25 to August 1, 
1893. Apparently nearest B. penicillata, but differing in its narrowly winged rachis, 
inflorescence, ete. 
B. Jagaroides resembles this somewhat, but has very congested inflorescence, and 
dull, glabrous leaves, 
Bursera tenuifolia Rose, sp. nov. 
Small tree, 7.5 meters high, 2.5 to 3 em. in diameter, glabrous throughout; leaves 
often clustered at the ends of short, stunted branches; leaflets 7 to 15, narrowly 
lanceolate, acute, cuneate at base, 1.2 to 3.6 mm, long, entire or slightly crenate; 
rachis 12 to 50 mm. long, slightly winged; flower clusters 1- to 3-flowered, several in 
the axil of the leaves, peduncle and pedicels very short; fruit 6 mm. long, 3-valved. 
Common on stony mountains. Collected by Dr, Edward Palmer, Lodiego, Octo- 
ber 9 to 15, 1891 (No. 1581). 
The tree has considerable top. When cut it exudes a gum-like substance with the 
odor of varnish. 
This species seems nearest 2, fragilis and B. pringlei. 
Mr. C. G. Pringle’s No, 4372, distributed as B. lancifolia Engler, appears to belong 
here. It seems to differ from that species in its slightly winged rachis, and fewer 
and narrower leaflets. 
Gouania mexicana Rose, sp. nov. 
A climbing shrub; branches, leaves, calyx and fruit softly tomentose; leaves 
oblong to ovate, aeute, glandular crenate, short-petioled; racemes elongated; flow- 
ers with short pedicels or subsessile; disk glabrous; fruit 4 mm. high, 6 mm. 
broad; wings very narrow. 
Seemingly a common species from Culiacan to Alamos in river bottoms, arroyos, 
and mountain passes. Collected by Dr. Edward Palmer, Culiacan, August 27 to 
September 25, 1891 (No, 1491); Ymala, September 25 to October 8, 1891 (No, 1694), 
