Part 1, 1907] UNACEAE 79 



numerous, strongly ascending or erect, somewhat persistent, the blades thick, narrowly 

 linear to linear-subulate, mostly 1-2.5 cm. long, acuminate, rather paler above than 

 beneath, entire; bracts similar to the leaves but smaller, mostly subulate; outer sepals lan- 

 ceolate, becoming 4-5 mm. long, sparingly glandular-toothed, especially near the middle ; 

 inner sepals nearly like the outer ones but with more glandular teeth ; petals yellow ; fila- 

 ments filiform-subulate ; staminodia prominent, 2-lobed ; styles united to about the middle ; 

 capsules broadly ovoid, about 4 mm. long, about equaling the sepals. 



Type collected at Parras, Coahuila, Mexico, March, 1905, C. A. Purpus 1122. 



Distribution : Known only from the type locality. 



30. Cathartolinum guatemalense (Benth.) Small. 



Linum guatemalense Benth. Bot. Voy. Sulphur 67. 1844. 



Perennial(?), deep green, glabrous, the stems mostly 3-8 dm. tall, slightly striate, 

 often purple, paniculately branched above, the branches ascending, slender, the cymules 

 open ; leaves mostly ascending, alternate, or sometimes opposite or whorled on shoots, the 

 blades thinnish, lanceolate to linear-lanceolate, or those of shoots sometimes elliptic or 

 oblong, 1-2 cm. long, acute, entire, sessile; bracts similar to the leaves but smaller, not 

 glandular-toothed ; outer sepals oblong-ovate, 3-3.5 mm. long, entire, or with 1 or 2 

 teeth near the base, acute ; inner sepals ovate, abruptly pointed, finely glandular-toothed 

 near the apex ; petals yellow ; filaments linear-subulate glabrous ; staminodia slenderly 

 subulate ; styles united below the middle ; capsules not seen. 



Tvpe locality : Guatemala. 



Distribution : Guatemala. 



31. Cathartolinum Orizabae (Planch.) Small. 



Union Orizabae Planch. L,ond. Jour. Bot. 7 : 482. 1848. 



Perennial, glabrous, the stems more or less closely tufted on the woody base, 3-5 

 dm. tall, narrowly winged, often purplish, paniculately branched above, the branches 

 rather stiff, the cymules rather compact ; leaves alternate, spreading or ascending, the 

 blades thinnish, oblong to linear-lanceolate, mostly 1-2.5 cm. long, acute or abruptly 

 pointed, entire, slightly paler beneath than above; bracts similar to the leaves but smaller, 

 not glandular-toothed ; outer sepals ovate, 3-3.5 mm. long, abruptly pointed, erose ; inner 

 sepals broadly ovate to orbicular-ovate, slightly shorter than the outer and more abruptly 

 pointed, erose or very finely glandular-toothed near the apex ; petals yellow ; filaments 

 subulate ; staminodia subulate ; styles united below the middle ; capsules globose-ovoid, 

 2.5 mm. long, surpassing the sepals. 



Type locality : Mt. Orizaba, Mexico. 

 Distribution : Mexico. 



32. Cathartolinum lecheoides (S. Wats.) Small. 



Linum lecheoides S. Wats. Proc. Am. Acad. 17 : 332. 1882. 



Perennial, pubescent, the stems often loosely tufted, about 3 dm. tall, purplish, hispid- 

 ulous, fastigiately paniculate above; leaves alternate or mainly so, spreading or ascending, 

 not crowded, the blades thickish, oblong to oblong-lanceolate, mostly 0.7-1.3 cm. long, 

 acute, glabrous above, pubescent beneath, entire, sessile ; bracts similar to the leaves but 

 smaller, not glandular-toothed ; outer sepals ovate, usually broadlyso, 2-2.5 mm. long, acute, 

 entire ; inner sepals oval-orbicular or somewhat obovate, nearly as long as the outer ones, 

 abruptly pointed and usually with a few gland-tipped cilium-like teeth near the apex ; petals 

 yellow ; filaments subulate, glabrous ; staminodia subulate ; styles united below the middle ; 

 capsules globose-ovoid, about 2 mm. long. 



Type locality : San Miguelito Mountains, near San Luis Potosi, Mexico. 



Distribution : Mexico. 



33. Cathartolinum mexicanum (H.B.K.) Small. 



Linum mexicanum H.B.K. Nov. Gen. & Sp. 7: 39. 1824. 



Perennial, glabrous or nearly so, bright-green, the stems solitary or sparingly tufted, 

 8-12 dm. tall, striate, or somewhat angled near the top, often purplish, paniculate above, 



