ROSE—MEXICAN AND CENTRAL AMERICAN PLANTS. 7 
Neotreleasea leiandra (Torr.) Rose. 
Tradescantia leiandra Torr. Bot. Mex. Bound. 224. 1859. 
Treleasea leiandra Rose, Contr. Nat. Herb, 5: 208. 1890. 
Roots slender, fibrous-thickened; stems erect, somewhat branching, slender, gla- 
brous, somewhat naked above; leaves distinct, narrowly lanceolate, 7.5 to 12.5 (per- 
haps more) em. long, 12 mm. wide, sharply acute, with margins not scabrous; margin 
of sheath glabrous or nearly so; involucral leaves 2, ovate, acuminate, 2.5 to 5.5 em. 
long, very unlike the lower leaves; umbel sessile, many-flowered; pedicels and sepals 
densely villose; filaments smooth; capsule oval, somewhat 3-lobed, stipitate; cells 5, 
2-seeded; seeds 1 mm. in diameter, slightly rugose. 
Collected by Bigelow on mountains and in moist rocky places at Puerto de Paysano, 
Tex., September 18, 1854 (?) (no. 1500), and by V. Havard at Capote Creek, Texas, 
September, 1883 (no. 79). 
Neotreleasea tumida (Lindley) Rose. 
Tradescantia tumida Lindley, Bot. Reg. 26: pl. 42. 1840. 
Tradescantia virginiana tumida Clark, in DC. Monogr. Phan, 3: 291, 1881. 
Treleasea tumida Rose, Contr. Nat. Herb. 5: 208. 1809. 
The figure cited above, although very unsatisfactory, seems to represent the same 
species as I collected on the western border of the Mexican table-lands. It has the 
same reddish flowers borne in dense axillary clusters, and the petals taper down into 
claws (here represented as united). The leaves are also described as purple beneath. 
This illustration of Lindley’s was made from a plant which flowered in the garden 
of the Horticultural Society in 1859. 
Nothing more of the history of the plant is given than that it came from Mexico. 
It is not unlikely that this plant was sent in by Hartweg from the same region from 
which mine came. In 1836 and 1838 he visited Bolafios and the neighboring region 
and was sending many plants home to the Horticultural Society, by which he had 
been sent to Mexico. I should state, however, that I have looked through Hart weg’s 
lists of plants, which he said were growing in the gardens, without finding any 
mention of a Tradescantia. 
The following redescription of this species is based upon my own specimens, both 
herbarium and living: 
Stem from tuberous-thickened roots, rather low, very succulent, the clumps often 
very compact; leaves oblong, 12 to 18 em. long, acute, more or less pubescent; flowers 
borne in dense axillary and terminal clusters; pedicels about 10 mm. long, glabrous; 
sepals glabrous or nearly so, oblong, 8 mm. long; petals pink; stamens slightly hairy; 
capsule stipitate, reflexed; hairy at tip. 
This species seems to be common in damp, sheltered places in the western table- 
land regions of Mexico, especially in canyons and along cliffs. It was first brought 
in by Mr. Goldman, and afterwards collected by mysell. 
Collected by J. N. Rose at San Juan Capistrano, Zacatecas, August 23, 1897 (no. 
2486): near Monte Escobedo, Zacatecas, August 27 (no. 2660), and at Bolanos, 
September 10 to 19 (no. 2890). 
Specimens were formerly grown in the Botanical Garden at Washington. This 
species is so common in the table-land region of Mexico that it scems strange that it 
is not in the recent collections from Mexico. 
Clark’s reference of this species as a variety of Tradescantia virgivana and statement 
that it can hardly be distinguished from var. flexvosa (7. pilosa) can not be entertained. 
UNCERTAIN SPECIES. 
Treleasea pumila Greene, Pittonia 4 : 225. 1900. 
Zebrina pumila Greene, op. cit. 1:157. 1888. 
While this paper was in proof the type specimens of Zehrina pumila, which have 
long been lost, came to light, and through the kindness of Dr. kK. L. Greene T have 
