32 UNACEJE. (flax family.) 



orbicular to semi-circular in outline; tlic lower toothed or cleft, the upper more narrowly 

 and deeply, 5 to t)-lobed or ]»arted; the segments sparingly toothed, often linear and 

 entire; flowers in naked elongated racemes; bractlets small, lanceolate; pedicels short, 

 naked; calyx often tomentose; petals emarginate, G to 12 lines long, ijurjjle; cariicla 

 smooth. 



2. S. humilis, Gr. INIuch resembling the last, Imt lower, and often decumbent at 

 the base; leaves smaller; llowers fewer and more scattered; calyx larger, 3 to G lines 

 long; cai'pels reticulated and pubescent. 



* * Annual, 



3. S. diploscypha, Gr. Pubescent with long spreading hairs, 1 to 2 ft. high; 

 leaves deeply a-'J-cleft with lobed segments; bractlets conspicuous, 5 to 7-parted, hispid; 

 flowers nearly sessile in close 3 to 5-ilowered clusters; petals 6 to 12 lines long, broad and 

 emarginate. 



4. S. malachroides, Gr. Stout, hirsute, 3 to 6 ft. high, tufted; leaves large; flowers 

 small, white or purplish, nearly sessile in close terminal heads on the short leafy branches; 

 petals narrowly obcordate; sets of stamens indistinct. 



Order 14. LINACEiE. 



A small order represented and characterized by the one genus 



1. LINUM, L. Flax. 



Parts of the flower 5, except sometimes in the pistil. Filaments united at the base 

 •with commonly alternating teeth. Styles 5, or sometimes only 2 or 3, distinct or united. 

 Stigmas capitate or oblong; ovary glolx)se. Seeds twice as many as the styles. Herbs 

 with sessile entire leaves without stipules, and cymose or panicled flowers. 



§ 1. Styles 5. Flowers blue. 



1. L. perenne, L. Smooth, 1 to 2^ ft. high, branching above, leafy; leaves linear 

 to linear-lanceolate, 3 to 18 lines long, acute; stipular glands none; flowers on slender 

 pedicels, scattered, large. 



§ 2. Styles 3; petals appendaged at base, ivlth a tooth on each side and a third adnate 

 to the inner face of the claio. 



* Flowers yellow; 2^<idicels short. 



2. L. BreTweri, Gr. Smooth, slender, 3 to 8 inches high or more, few flowered at 

 the summit; leaves linear-setaceous, G to 8 lines long; stipular glands conspicuous; petals 



3 or more lines long. 



* * Floioers rose-purjyle to irhite. 



3. L. cougestum, Gr. Nearly smooth, excepting the calyx, about a foot high; 



