74 NORTH AMERICAN FLORA [Volume 25 



10. Cathartolinum Pringlei (S. Wats.) Small. 

 Linum Pringlei S. Wats. Proc. Am. Acad. 23 : 269. 1888. 



Biennial, or perennial (?), glabrous, somewhat glaucous, the stem or branches erect, 

 1.5-5 dm. tall, with few or several elongate erect or ascending slender branches, especially 

 near the top ; leaves numerous and approximate or crowded near the base of the plant, 

 fewer and more distant above, alternate or sometimes apparently opposite below, mostly 

 erect or appressed, the blades thick, those of the lower leaves oblong to elliptic, 3-9 mm. 

 long, those of the upper linear or nearly so, longer than those of the lower ones and grad- 

 ually increasing in size up to the inflorescence, slightly acuminate ; bracts linear-subulate 

 to subulate; outer sepals oblong-lanceolate, 4-5 mm. long at maturity, entire or nearly so, 

 acuminate ; inner sepals ovate, somewhat shorter than the outer, glandular-toothed, short- 

 pointed ; petals white or sometimes yellowish ; staminodia 2-lobed ; styles distinct ; capsules 

 ovoid, about 3 mm. long, surpassed by the sepals. 



Tvpe locality : Sierra Madre, Chihuahua, Mexico. 

 Distribution : Chihuahua. 



11. Cathartolinum catharticum (L,.) Small. 



Linum catharticum L. Sp. PI. 281. 1753. 

 Cathartolinum pratense Reichenb. Handb. 307. 1S37. 



Annual, glabrous, deep green, the stem simple, or usually branched at the base, the 

 branches loosely corymbose above, 0.5-3 dm. tall, relatively slender; leaves few, mostly 

 opposite, the blades obovate to oblong or linear-oblong, 0.4-1.3 cm. long, obtuse, very 

 minutely toothed, sessile ; bracts similar to the leaves but smaller and more manifestly 

 toothed ; outer sepals ovate-lanceolate, about 3 mm. long at maturity, acute, sparingl_v 

 glandular-toothed ; inner sepals quite similar to the outer, but slightly broader and with 

 more glandular teeth and rather acuminate ; petals white ; staminodia subulate ; styles dis- 

 tinct ; capsules ovoid or globose-ovoid, about 2 mm. long. 



Type locality : Northern Europe. 



Distribution : Nova Scotia. Naturalized from Europe. 



Illustrations : Fl. Dan. pi. SSI: Engrl. Bot.pl. 382; Woodv. Med. Bot. 5://. 18; Schkuhr, 

 Handb. pi. 87 ; Britt. & Brown, 111. Fl./. 2266. 



12. Cathartolinum scabrellum (Planch.) Small. 



Linum scabrellum Planch. Lond. Jour. Bot. 7: 507. 1848. 



Perennial, dull-green, the stem usually branched at the base and above, the branches 

 stoutish, 0.5-3 dm. tall, finely hirsute, often irregularly again branched, terminating in 

 partially congested small corymb-like cymes ; leaves approximate but not crowded, ap- 

 pressed to the stem or branches, the blades thick, linear to linear-lanceolate, 3-9 mm. 

 long, acute, sparingly pubescent, entire or those of the upper ones with few glandular 

 teeth, all sessile; bracts subulate, glandular-toothed; outer sepals lanceolate, 5-5.5 mm. 

 long at maturity, coarsely glandular-toothed ; inner sepals shorter and slightly broader 

 than the outer, more closely glandular-toothed, and more acuminate; petals yellow; 

 filaments pubescent at the base ; staminodia entire, minute ; styles distinct ; capsules ovoid, 

 about 2.5 mm. long, about equaling the sepals. 



Type locality : Zimapan, Mexico. 

 Distribution : Mexico. 



13. Cathartolinum corallicola Small, sp. now 

 Annual, gray-green, the stems usually simple below, with several elongate erect or 

 ascending rather slender branches above, minutely hirsute, the branches terminating in 

 interrupted raceme-like cymes ; leaves distant, at least not approximate, more or less 

 spreading, alternate, or sometimes opposite near the base of the stem, the blades thinnish, 

 oblong to linear-oblong or linear, 6-12 mm. long, acute, or slightly acuminate, finely 

 pubescent, glandular-ciliate ; bracts lanceolate to subulate, more closely glandular-ciliate 

 than the leaf-blades ; outer sepals oblong-ovate, 5 mm. long at maturity, closely glandular- 

 toothed and pubescent ; inner sepals slightly shorter and broader than the outer, scarcely 



