

FLAX FAMILY. 



439 



'athartolinum sulcatum (Riddell) Small. Vv 

 Grooved Yellow Flax. Fig. 2682. 



ii sulcatum Riddell, Suppl. Cat. Ohio PI. 10. 1836. 

 n Boottii Planch. Lond. Journ. Bot. 7: 475. 1848. 

 m simplex Wood, Bot. & Flor. 66. 1870. 

 rtolimtm sulcatum Small, N. A. Fl. 25*: 78. 1907. 



nual, simple or branched, i-2 high. Stem 



-angled and grooved, at least above; leaves 



late, lanceolate or linear, 8"-i2" long, i"-ij" 



acute or acuminate, 3-nerved, the lower gla- 



, the upper smaller and glandular-ciliate, as are 



oral bracts and sepals; stipules represented by 



>f small globose dark-colored glands; flowers 



>e or corymbose, about 6" broad, yellow; 



Is i "-4" long; sepals lanceolate, acute, slightly 



i; r than the ovoid, acute, incompletely lo-celled 



-tyles separate above the middle; septa of the 



e ciliate. 



dry soil, Ontario to Manitoba, Massachusetts, 

 ia, west to Texas, rare near the Atlantic coast. 



er. 



7. Cathartolinum rigidum ( Pursh) 



Small. Large-flowered Yellow 



Flax. Fig. 2683. 



Linum rigidum Pursh, Fl. Am. Sept. 210. 



1814. 

 Cathartolinum rigidum Small, N. A. Fl. 25* : 



82. 1907. 



Perennial (?), 6'-i5' high, branched, 

 glaucous, glabrous or puberulent. 

 Branches stiff, more or less angular; 

 leaves erect, linear or linear-lanceolate, 

 4"-i2" long, i"-i" wide, acute or mu- 

 cronate, the upper ones glandular-serru- 

 late or ciliate ; stipular glands minute, 

 globose, sometimes wanting ; flowers yel- 

 low, 9"-i5" broad; sepals lanceolate, 

 acute or awn-pointed, glandular-serru- 

 late, the outer ones becoming 3"-4" 

 long; petals cuneate-obovate, twice the 

 length of the sepals ; styles separate 

 only at the summit ; capsule ovoid, 

 5-valved, shorter than the sepals, 2"-2$" 

 long. 



Prairies, Saskatchewan to Manitoba, Mis- 

 souri, Texas and Colorado. Summer. 



tthartolinum Berlandieri (Hook.) Small. Ber- 

 landier's Yellow Flax. Fig. 2684. 



'erlandieri Hook. Bot. Mag. sub pi. 3480. 1836. 

 vinsanum Osterhout, Bull. Torr. Club 28: 644. 1901. 

 idandieri Small, N. A. Fl. 25*: 82. 1907. 



^.i ual (?),2i'-i6' high, often much-branched, bright green 

 'metimes glaucescent when young. Branches ascending, 

 a -winged; leaves spreading or ascending, linear to nar- 

 I linear-lanceolate, mostly 7"-2o" long, acuminate; stipu- 

 lar nds, when present, short; bracts glandular-toothed; 

 s bright yellow, i6"-24" broad; sepals lanceolate, the 

 'i ones becoming 4^"-5J" long, all evenly glandular- 

 tootld; petals obovate, 84 "-u" long; capsule ovoid, 2"-2i" 

 long. 



In -y soil, Kansas and Colorado to Texas. Spring, 

 aiartolinum compactum (A. Nelson) Small, a species re- 

 ) C. rigidum, ranges from the Rocky Mountain region into 

 Morth)akota and Kansas. It is a low dull green plant with small 

 nowe:. the petals less than 5" long. 



