Linum. LINAGES. 345 



•i— Annaal : stigmas elongated : species introduced through cultivation. 



Li. usiTATfssiMUM, L. Corjmbosely branched above, loosely leafy: leaves lanceolate, very 

 acute, 3-uerved, the larger an inch or two long : sepals broadly ovate, acuminate, the interior 

 scarious-margined and ciliate, prominently 3-nerved, the lateral nerves evanescent : petals 

 about 5 lines long : stigmas subclavate, about as long as the styles : capsule broadly ovoid- 

 conical, about 3 lines long, a little surpassing the calyx, nearly indehiscent, the septa not 

 ciliate. — Spec. i. 277; Torr. & Gray, ¥1. i. 204; Reichenb. Ic. Fl. Germ. vi. t. 329, f. 5155; 

 Planch. I. c. vii. 165; Boiss. Fl. Or. i. 860; Trelease, 1. c. 12. — Along railroads, about flax- 

 mills, in fields, etc., at various points throughout the country. (Introd. from Old World.) 



Li. humile. Mill. Similar to and commonly confounded with the last, but mostly lower : 

 capsule 3 to 4 lines long, nearly twice as long as the calyx, more deeply dehiscent, with cili- 

 ate septa. — Diet. ed. 8, no. 2; Planch. 1. c. ; Boiss. Fl. Or. i. 861 ; Trelease, 1. c. L. usita- 

 tissimuin, y3. crepitans, Schiib. & Martens, Fl. Wiirtemb. 211. — In similar situations to the 

 last, east of the Mississippi River. (Introd. from Old World.) 



•t— ■*— Perennial but often flowering the first year : stigmas little longer than broad : 

 Western. 



L. Lewisii, Pursh. Mostly cespitose : leaves oval to linear, sometimes rather obtuse, 3-5- 

 nerved, the larger over an inch long : flowers somewhat corymbed : sepals broadly ovate, the 

 inner margins scarious, sometimes erose but not ciliate, more or less 3-5-keeled below : petals 

 7 to 10 lines long : capsule ovoid, frequently acute, 3 to 4 lines long, once or twice exceeding 

 the calyx, incompletely 10-celled and 10-valved, with ciliate septa, the valves dehiscing widely 

 above and separating through the mealy partitions nearly to the centre below. — Fl. i. 210 ; 

 Barton, Fl. N. Am. i. 30, t. 8; Alefeld, Bot. Zeit. xxv. 250; Trelease, 1. c. L. perenne, 

 L. Spec. i. 277, in part; Torr. & Gray, Fl. i. 204; Gray, Gen. 111. ii. 108, t. 143, f. 9, 10; 

 Meehan, Native Flowers, ser. 1, i. 117, t. 30. L. Sibiricum, var. Lewisii, Lindl. Bot. B«g. 

 t. 1163. L. perenne, var. Lewisii, Eat. & Wr. N. A. Bot. 302. L. decurrens, Kellogg, Proc. 

 Cal. Acad. Sci. iii. 44, f. 11. L. LyaUanum, Alefeld, 1. c. 251. — From the Hudson Bay region 

 to Brit. Columbia, south through Washington and the Daliotas to California and Texas. 



* * Exstipulate or with stipular glands : pedicels mostly short : flowers small or medium- 

 sized, yellow : at least some of the sepals glandular-ciliate or serrulate : petals not appen- 

 daged : filaments without intervening appendages : carpels 5 ; stigmas capitate : capsule 

 small (less than 3 lines long), with firm septa, the false septa sometimes membranous 

 toward the inner margin or incomplete; seeds flattened, small. — § Linastrum. 



•i— Sepals persistent : capsule small (scarcely 2 lines long), 10-valved: carpels without car- 

 tilaginous insertions at base : more or less corymbosely or paniculately branched slender 

 glabrous plants about a foot high. 



■H- Leaves and bracts entire : no stipular glands : styles distinct to base. 



= False septa nearly or quite complete, not ciliate : Eastern. 



a. Stem terete below, only the lowest leaves opposite. 



Li. Ploridanum, Trelease. Perennial: stems several from the same root, erect, simple 

 below, terete and striate or the branches slightly angled : leaves oblong or oblong-lanceolate, 

 mo,stly acute, 1 -nerved, the larger 10 lines long, mostly suberect : flowering branches few, 

 ascending or recurving, sparingly leafy, with few sometimes secund flowers : sepals ovate, 

 taper-pointed, keeled, the covered margins glanduliferous : petals about 3 lines long : cap- 

 sule ovoid, a line and a half long, equal to or exceeding the calyx. — Trelease, 1. c. 13. L. 

 Virginianum, var.? Floridanum, Planch. 1. c. vii. 480. — S. Carolina, Santee Canal, Ravenel, 

 to Florida and Louisiana, Covington, Drummond, 96. 



L. Virginianum, L. Similar to the last, annual, or suckering from the ba.se, less clus- 

 tered, more loosely branched, the flowering branches recurved-spreading or corymbose : 

 leaves sometimes bluish, often spreading : capsule depressed-globose, very obtuse, a line 

 long, mostly shorter than the calyx. — Spec. i. 279; Hill, Veg. Syst. xiv. t. 43, f. 1 ; Walt. 

 Car. 117; Ell. Sk. i. 375; Torr. & Gray, Fl. i. 204; Planch. 1. c. ; Gray, Gen. 111. ii. 108, t. 

 143, f. 1-8; Trelease, 1. c. — Canada to N. Carolina and Alabama, westward to Texas and 

 Missouri. 



