Part 1, 1907] LINACKAK 81 



37. Cathartolinum alatum Small. 



Linum Berlandieri PlotziitxA. Trans. Acad. St. Louis 5 : 16. 18S7. Not Linum Plotzii Hook. 



1836. 

 Linum marginatum Small, Fl. SE. U. S. 663. 1903. Not L. marginatum Poir. 



Plants 1-1.5 dm. tall, bright-green, glabrous. Stems simple below, or branched at the 

 base, the branches erect or ascending, striate-angled, sparingly corymbose above, the short 

 branches stiff ; leaves rather few, more numerous and often approximate at the base of the 

 stem, more distant above, erect or ascending, the blades thickish, linear to narrowly linear- 

 lanceolate, those near the base of the stem and branches narrower than the upper ones, 

 acute or acuminate, entire, involute ; bracts lanceolate, glandular-toothed ; outer sepals 

 oblong-ovate, becoming 6 mm. long, acute or slightly acuminate, with broad coarsely 

 glandular-toothed margins ; inner sepals slightly shorter than the outer, ovate, with more 

 and rather smaller teeth; petals yellow, 10-12 mm. long; capsules broadly ovoid, about 4 

 mm. long. 



Type locality : Texas. 

 Distribution : Texas. 



38. Cathartolinum australe (Heller) Small. 



Linum australe Heller, Bull. Torrey Club 25 : 627. 1898. 



Plants 1-5.5 dm. tall, pale-green, and somewhat glaucous when young, glabrous or 

 nearly so. Stems simple below, or branched at or near the base, the branches erect or 

 ascending, striate, corymbose above, the branches of the inflorescence rather slender but 

 strict and stiff ; leaves rather few even at the base of the stem and early deciduous, remote 

 above, erect or nearly so and more persistent than the lower ones, the blades thick, linear 

 to linear-subulate, acute or acuminate, serrulate, sessile ; bracts subulate, glandular-toothed; 

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

 toothed, each narrowed into a long very slender spine-like tip ; inner sepals slightly broader 

 than the outer, more closely toothed and often with more slender tips ; petals pale-yellow, 

 6-9 mm. long; capsules ovoid, 3-3.5 mm. long. 



Type locality : Four miles east of Santa Fe, New Mexico. 

 Distribution : Colorado to New Mexico, Arizona, and northern Mexico. 



39. Cathartolinum compactum (A. Nelson) Small. 



Linum compactum A. Nelson, Bull. Torrey Club 31 : 241. 1904. 



Plants 1-1.7 dm. tall, dull-green, nearly glabrous or rough-puberulent. Stems branched 

 at the base, the branches often numerous, erect or ascending, striate-angled, eorymbosely 

 branched, the cymules rather compact; leaves numerous near the base of the plant, and 

 spreading, but early deciduous, the upper ones more persistent, erect or ascending, the 

 blades thickish, linear, entire, acute or acuminate, sessile ; bracts lanceolate, glandular- 

 toothed ; outer sepals lanceolate, becoming 6-8 mm. long, acuminate, quite evenly glandu- 

 lar-toothed ; inner sepals much shorter than the outer ones, more decidedly acuminate and 

 more closely toothed ; petals yellow, 7-9 mm. long ; capsules ovoid, about 4 mm. long. 



Type locality : Torrington, Wyoming. 



Distribution : North Dakota and Montana to Kansas and Wyoming. 



40. Cathartolinum Carteri Small. 



Linum Carteri Small, Bull. N. Y. Bot. Card. 3: 424. 1905. 



Plants 1-3 dm. tall, bright green, smooth and glabrous except the sometimes scabrous 

 stem-angles. Stems usually simple below or rarely with few slender branches near the base, 

 eorymbosely branched above, the cymules open, the branches ascending, stiff, but often 

 flexuous, prominently sharp-ridged ; leaves alternate, rather approximate on the lower part 

 of the stem, distant above, erector ascending, the blades narrowly linear to linear-subulate, 

 acuminate, entire, except sometimes near the inflorescence, sessile ; bracts subulate or 

 lanceolate-subulate, glandular-toothed ; outer sepals lanceolate or oblong-lanceolate, becom- 

 ing 6-7 mm. long, acuminate and slender-tipped, regularly glandular-toothed ; inner sepals 



