80 NORTH AMERICAN FLORA [Volume 25 



the branches ascending, the cymules ultimately open ; leaves alternate, or opposite on the 

 lower part of the stem, erect or ascending, the blades thickish, lanceolate or oblong, 1-3 

 cm. long, acute or abruptly pointed, entire, scarcely paler beneath than above, sessile ; 

 bracts similar to the leaves but smaller, not glandular-toothed, but usually ciliate ; outer 

 sepals ovate or oblong-ovate, acute, entire or nearly so, or with 1 or 2 basal teeth ; inner 

 sepals broadly ovate or somewhat obovate, 3-3.5 mm. long, rather abruptly pointed, erose 

 or sparingly glandular-toothed ; petals yellow ; filaments subulate, glabrous ; staminodia 

 subulate, often inequilateral; styles united to above the middle; capsules ovoid, about 3 

 mm. long, surpassing the sepals. 



Type locality : Santa Rosa, Mexico. 

 Distribution : Mexico. 



34. Cathartolinum hypericifolium (Presl) Small. 



I. inum hypericifolium Presl, Rel. Haenk. 2: 2. 1831. 



Perennial, glabrous, bright-green, the stems erect, 2.5-6 dm. tall, angled, paniculately 

 branched above, the branches spreading or ascending ; leaves rather remote, alternate, or 

 opposite or whorled on the lower part of the stem, spreading, the blades mainly ovate- 

 oblong, about 1 cm. long, acute, obscurely serrulate, scarcely paler beneath than above, 

 sessile ; bracts similar to the leaves but smaller, minutely serrulate ; outer sepals ovate or 

 oblong-ovate, 4 mm. long, acute, entire ; inner sepals broadly ovate, nearly as long as the 

 outer ones, acute or acuminate, entire ; petals yellow ; filaments lanceolate, glabrous ; 

 staminodia wanting ; styles united at the base ; capsules ovoid, about 2 mm. long, surpass- 

 ing the sepals. 



Type locality : Mexico. 

 Distribution: Mexico. 



35. Cathartolinum puberulum (Engelm.) Small. 



Linum rigidum puberulum Engelm. in A. Gray, PI. Wright. 1: 25. 1852. 

 Linum puberulum Heller, PI. World 1 : 22. 1897. 



Plants 0.5-3 dm. tall, pale-green and often glaucous. Stems usually branched at the 

 base and throughout, but rarely simple below, the branches striate-angled, closely pale- 

 puberulent, loosely spreading, terminating in open cymes ; leaves numerous and approxi- 

 mate or crowded at the base of the stem, remote above, erect or ascending, the blades thick, 

 those of the lower leaves linear-spatulate or linear, entire, those of the upper leaves nar- 

 rowly linear to subulate, often glandular-toothed below the middle, all acute ; bracts subu- 

 late, glandular-toothed ; outer sepals narrowly lanceolate, becoming 7-9 mm. long, quite 

 regularly glandular- toothed, acuminate ; inner sepals shorter and slightly broader than the 

 outer ones, the glandular teeth much coarser towards the apex than below ; petals light- 

 yellow, 12-17 mm. long; capsules oblong-ovoid, 3.5^1 mm. long, surpassed by the sepals. 



Type locality: Santa Fe to the Cimarron River, New Mexico. 

 Distribution : Colorado and Utah to Texas and Arizona. 



36. Cathartolinum vernale (Wooton) Small. 



Linum vernale Wooton, Bull. Torrey Club 25 : 452. 1898. 



Plants 1—1 dm. tall, light- or pale-green and sometimes glaucescent when young. 

 Stems usually branched at the base and throughout, the branches striate or striate-angled 

 in age, glabrous, stiff and erect or nearly so, terminating in open few-flowered cymes ; 

 leaves numerous, crowded and imbricated at the base of the stem and the branches, erect or 

 ascending, the blades thick, narrowly linear to subulate, those of the lower leaves entire, 

 those of the upper leaves often glandular-toothed, all sharply acute ; bracts subulate, 

 glandular-toothed ; outer sepals lanceolate or oblong-lanceolate, becoming 6-8 mm. long, 

 acuminate, rather evenly glandular-toothed ; inner sepals mostly oblong-lanceolate, shorter 

 than the outer ones, and more evenly arid finely toothed; petals yellow, 15-20 mm. long, 

 each with a dark blotch near the base ; capsules ovoid, 4 mm. long. 



Type locality : Tortugas Mountain, about five miles east of Las Cruces, Dona Ana County, 

 New Mexico. 



Distribution : Texas and New Mexico. 



