630 



LlNACEAE 



Linum 



Jan. 

 Feb. 

 Mar. 

 Apr. 

 May 

 June 

 July 

 Aug. 

 Sept. 

 Oct. 

 Nov. 

 Dec. 



Miles 



50 



Map 1301 

 Lmum intercursum Blckn. 



50 



Map 1302 



Linum virginianum L 



55 



Map 1303 



Linum striatum Walt 



Sutures of capsules not elevated; segments not concave between the sutures; in- 

 florescence with the axis usually straight, not dichotomously branched, the 

 branches straight and strongly ascending. 

 Stem leaves usually lax, thin, merely acute; leaves of branches acute or 

 acuminate; branches ascending usually at an angle of between 40 and 60 

 degrees; sepals about as long as or slightly shorter than the capsule; 

 margins of the inner sepals entire or slightly erose or glandular toward 



the apex, abruptly acuminate at the apex 4. L. striatum. 



Stem leaves stiff, usually erect or strongly ascending, with rigid, acuminate 

 tips; leaves of the branches stiff, narrow, almost appressed, apiculate at 

 the apex; branches ascending at an angle of mostly between 60 and 75 de- 

 grees; sepals usually about a half longer than the capsule; margins of the 

 inner sepals glandular usually to the middle or below the middle, gradually 

 tapering at the apex into long, indurated tips. .5. L. medium var. texanum. 



1. Linum sulcatum Riddell. Map 1300. This species was reported from 

 Jasper and Lake Counties before our manuals recognized Linum medium 

 var. texanum to which I believe both records should be referred. The Lake 

 County specimen was collected by Hill, July 28, 1875, near Pine and is 

 deposited in the herbarium of DePauw University. It is labeled Linum 

 sulcatum but is Linum medium var. texanum. My specimens were collected 

 on the low, moist, gravelly border of the north side of Wall Lake, Lagrange 

 County; on the dry, gravelly bank of the St. Joseph River, St. Joseph 

 County; and on the dry, gravelly, high bank of Big Wea Creek about 4 

 miles southwest of Lafayette, Tippecanoe County. Charles M. Ek found 

 a colony along a railroad in Howard County. The only specimens from the 

 southern part of the state are one collected by Clapp in Harrison County 

 near Palmyra, July 14, 1836, which is now in the herbarium of Wabash 

 College, and one which I collected in the same county on a post oak ridge 

 about 5 miles southwest of Corydon. 



Eastern Mass. and Vt. to Man., southw. to Ga. and Tex. 



2. Linum intercursum Bickn. (Bull. Torrey Bot. Club 39: 418-420. 

 1912.) Map 1301. Moist, sandy soil on the borders of marshes in black 

 oak woods. Rare. 



