Linum Linaceae 629 



6. Oxalis europaea Jordan. (Rhodora 27: 134. 1925.) (Oxalis corni- 

 culata of Gray, Man., ed. 7, not L.) Lady's Sorrel. Map 1297. The flowers 

 are generally yellow but I have one specimen with greenish and one with 

 green petals. The color note was made when the specimens were collected. 



This species is found most frequently in open beech and sugar maple 

 woods but is also found in moister woods and in the open along roadsides. 



Que. to N. Dak., southw. to Ga., Tenn., Okla., and Colo. 



6a. Oxalis europaea f. cymosa (Small) Wieg. (Rhodora 27: 135. 1925.) 

 (Xanthoxalis cymosa Small.) Map 1298. In open or rather thick wood- 

 land, clearings, and fallow fields and along roadsides and railroads. 



In a low woods on the north side of Eggwood Pond and in a low woods 

 about two miles southeast of East Mt. Carmel in Gibson County, I collected 

 a form with leaves that are greenish purple above and purple beneath. 



Que. to Mich., southw. to N. C, Tenn., and Mo. 



6b. Oxalis europaea f. villicaulis Wieg. (Rhodora 27: 135. 1925.) Map 

 1299. This form and f. cymosa are our common tall woodland sorrels. 



In dry or wet woodland and rarely in the open along fences and road- 

 sides. 



N. S., Mass. to Mich., southw. to Va., Tenn., and 111. 



6c. Oxalis europaea var. Bushii Small f. subglabrata Wieg. (Rho- 

 dora 27: 136. 1925.) My only specimen is from a low woods in Daviess 

 County. It has also been collected in St. Joseph and Tippecanoe Counties. 



111., Iowa, and Mo. 



6d. Oxalis europaea var. Bushii f. vestita Wieg. (Rhodora 27: 136. 

 1925.) In open woods and old fields. 

 Mass. and 111. 



132. LINACEAE Dumort. Flax Family 



3945. LINUM [Tourn.] L. Flax 



Flowers blue; capsules mostly 7-10 mm wide. (See excluded species no. 414, p. 1069.) 



L. usitatissimum. 



Flowers yellow; capsules mostly 2-3.5 mm wide. 



Leaves with dark glands at the base instead of stipules, 3-nerved (the outer two 

 sometimes too close to the margin to be very distinct); margin of the outer and 

 inner sepals more or less glandular; capsules about 3 mm wide; false septa 



incomplete, ciliate 1. L. sulcatum. 



Leaves without dark, stipular glands, 1-nerved; margin of the outer sepals not 

 glandular; capsules less than 3 mm wide; false septa nearly complete, not ciliate. 



Capsules ovoid; sepals about 2 mm long, shorter than the mature capsule 



2. L. intercursum. 



Capsules depressed at the summit. 



Sutures of capsules slightly elevated; segments of capsules slightly concave 

 between the sutures; cauline leaves thin, lax, acute; axis of inflorescence 

 flexuous, the branches few, more or less flexuous; inflorescence more or less 

 dichotomously branched, even to the ultimate divisions; outer sepals notice- 

 ably longer than the apex of the capsule, the inner ones about as long as 



the capsule and their margins not glandular below the middle 



3. L. virginianum. 



