46 
2. TILIA Tourn. (LINDEN. Basswoop.) 
Large trees, with soft white wood, very fibrous and tough inner 
bark, more or less heart-shaped and serrate alternate leaves (oblique 
and often truncate at base), smallagymes of cream-colored fragrant 
flowers hung on an axillary peduncle united to a large strap-shaped 
bract, 5 sepals and petals, numerous stamens in 5 clusters, and a dry 
and woody indehiscent globular fruit becoming 1-celled and 1 or 
2-seeded. 
1. T. Americana L. (BAsswoop.) Leaves large, green and glabrous or nearly 
so, thickish: floral bract usually tapering at base: fruit ovoid.—A large and hand- 
some tree of the Atlantic States, extending in Texas to the valley of the San Anto- 
nio River. 
LINEH. (FLAX FAmILy.) 
Herbs (rarely shrubs), with sessile mostly entire leaves, usually 
ephemeral flowers, regular and symmetrical flowers 5-merous through- 
out, imbricated calyx, convolute petals, 5 stamens united at base, and 
a 10-seeded 5-celled pod (or 10-celled by false partitions). 
1. LINUM Tourn. (FLAX.) 
Herbs, with tough fibrous bark, alternate (sometimes opposite) leaves 
without stipules or with glands in their place, persistent sepals and 
ephemeral petals, and a 5-celled pod with 2 seeds hanging from the 
summit of each cell, which is partly or completely divided into two by 
a false partition projecting from the back of the carpel, the pod thus 
becoming 10-celled. 
* Flowers large, blue: sepals not glandular-margined: carpels not cartilaginous at base: 
styles distinct. : 
1. L. perenne L., var. Lewisu Eat. & Wright. Perennial: glabrous and glau- 
cous, 3 to 9 dm. high: stems mostly cespitosely clustered: leaves often somewhat 
crowded, oval-linear, acute: flowers few on rather long peduncles: sepals obtuse or 
acutish, the petals thrice as long: pod ovoid, obtuse. (1. perenne of most American 
authors.)—Very common among the hills of western Texas, especially west of the 
Pecos. 
** Flowers rather small, yellow: sepals more or less glandular-ciliate or serrulate. 
+ Pod 2 to3 mm. long, 10-valved: carpels not cartilaginous at base. 
++ Leaves and bracts entire: no stipular glands. 
2. L. Virginianum L. Perennial, glabrous, 4.5 to 6 dm. high, erect, rather 
loosely branched, the flowering branches recurved-spreading or corymbose: leaves 
remote or somewhat approximated, some of the lowest usnally opposite, oblong or 
oblong-lanceolate, mostly acute: sepals ovate, taper-pointed, keeled: pod depressed- 
globose, very obtuse, about 2 mm. long, the false partitions essentially complete.—Dry 
soil, throughout the Atlantic States and extending into Texas, and perhaps as far 
west as our eastern limit. 
3. L. Greggii Engelm. Like the last, but lower, more strict and ascending, 25 cm. 
high, with smaller leaves, more contracted cymes of scattered flowers, distinct styles 
with coherent stigmas, and the false partitions of the pod incomplete.—A Mexican 
species, reported by Dr. Havard from the mountains (Guadalupe and Chisos) of west- 
ern Texas. Altogether asmaller, stricter, smaller-leaved species than L. Virginianum, 
The leayes are apt to be quite closely imbricated at the base of the stem. 
