790 LINACEAE 
1. LINUM [Tourn.] L. Herbs. Leaves alternate, without stipules 
Sepals 5, glabrous, or the inner ones sometimes ciliate. Petals blue or rarely 
white, unappendaged. ndroecium of 5 
stamens and 5 short staminodia. Styles 5, 
distinct. Capsule 5-celled and with incom- 
plete partitions, the carpels ridged on the 
back. ut 8 species, natives of warm and 
temperate regions.—FLAXE ES 
1. L. usitatissimum L. Stem 2-9 dm. 
leaves tee few, long er ee blades 
long-pointed: corolla blue, 1.5-2 cm. wide 
sule 7—10 m = 
n 
LINN.)—Fields, roadsides, and railroad em 
ER. often in ac A soils, eo o 
n A ~ S Na t. of E 
ult.—Sum bur furn ishes flax ad 
linen, and m seeds are the sources of linseed- oil. 
2. CATHARTOLINUM Reichenb. Herbs. Leaves alternate or occasion- 
ally opposite, sometimes with stipular glands. Sepals 5, the inner ones at least 
with gland- uu teeth. Petals yellow, sometimes pubescent within near the 
se. Androecium of 5 stamens, generally without staminodia. Styles 5, dis-. 
Gace or aa teal o 5-celled, or completely or incompletely 10- Ed by 
i ses —About 70 species, of wide geographic distribution.—Sum. or 
ar S cU M M 
Styles distinct: corolla approximately E: cm. wide. I. VIRGINIANA. 
Styles more or less united: corolla wi 
Sepals persistent: capsule without thidkésifues at dur base: 
stipular glands present: corolla about 1.5 cm. wide. II. SULCATA. 
Sepals deciduous: capsule with cartilaginous thickenings at 
e: sti ipular glands wanting or obscure: corolla 2-3 
em. wide. III. RIGIDA. 
I. VIRGINIANA 
Staminodia wanting. 
Sepals entire at maturity, the inner ones sometimes erose on account of the bases 
of the deciduous glandular hairs. 
Stem paniculately branched: outer sepals 2-2.5 mm. long at maturity. 
1. C.striatum. 
Stem corymbosely branched: outer sepals 3-3.5 mm. 
long at maturity. 2. C. virginianum. 
SUB either those of the inner series, or of the outer, 
of both aed glandular-toothe ed. 
Ca psule dep 
fabas typically lanceolate: inner sepals 
"oru tis long-pointed. 3. C. medium. 
Outer sepals typically ovate: inner sepals acute 
or abruptly short-pointed. 4. C. Curtissii. 
Capsule ovoi 
Ou ter and inner sepals nearly equal at maturity, 
shorter than the capsule or about equalling 
it. 
Outer sepals mostly over 3 mm. long: capsule 
broadly ovoid, obtuse 5. C. floridanum. 
cm Ri less than 3 mm. long: capsule 
narrowly ovoid, acute. 6. C. intercursum. 
Outer sepals much longer than the inner, all sur- 
assing the capsule. S C. macrosepalum. 
nt. 
p 
Staminodia presen C. arenicola. 
II. Sv 
Sepals, especially the outer ones, EU. ud irregularly 
toothed, elliptic-lanceolate, short-acuminate: capsule nar- 
rowly ovoid. 9. C. Harperi. 
