BOEBAGINACEiE. (bOKAGE FAMILY.) 361 



7. LITHOSPERMUM, L. Gromwell. 



Calyx 5-parted, the lobes equal. Corolla funnel- or salver-form, obtusely 

 5-lobed, smooth, gibbous or hairy in the throat. Anthers obloug, nearly ses- 

 sile, included. Stigma capitate, somewhat 2-lobed. Nutlets 1-4, ovate, stony, 

 truncate at the base. — Chiefly rough-hairy herbs, with red roots, alternate 

 entire leaves, and variously colored flowers in leafy-bracted racemes or 



spikes. 



* Annual : nutlets rougJiened . 



1 . L. arvense, L. Hough with appressed hairs ; stem branching from 

 the base ; leaves lanceolate ; flowers scattered ; corolla yellowisli white, about 

 as long as the linear-subulate lobes of the calyx ; nutlets 4. — Waste places. 

 March - April. Introduced. — Stem 6' - 1 8' high. Leaves V -2'- long. 



* * Perennials : nutlets smooth, white. 



2. L. tuberosum, Rugel. Hispid with scattered rigid hairs ; stem erect, 

 branching above; leaves somewhat 3-nerved ; radical ones large (4' -6' long), 

 obovate-oblong, narrowed into a petiole tubercular-hispid above ; the otliers 

 oblong, sessile ; calyx lobes linear, as long as the tube of the small yellowish 

 white corolla, and twice as long as the mostly solitary polished nutlet. — 

 Rocky woods, West Florida. April -May. — Plant 6' -10' high, increasing 

 in fruit to 2° or more. Roots bearing oblong tubers. 



3. L, latifolium, Michx. Softly pubescent ; leaves broadly lanceolate, 

 acute or acuiuiuate ; root fibrous ; otherwise like the preceding. — Tennessee, 

 and northward. — Stem l°-2° high. 



4. L. hirtum, Lehm. Hispid with rigid glossy hairs ; stem mostly sim- 

 ple, erect ; leaves linear-lanceolate, obtuse, sessile ; the lowest scale-like ; the 

 floral ones ovate-lanceolate ; corolla large, yellow ; the tube rather longer than 

 tiie linear calyx lobes ; nutlets ovate, polished. — Dry pine barrens. April - 

 May. — Stem \°- 1 }f high. Leaves 1' - 2' long. Corolla 6" - 8" long. Root 

 very long. 



5. L. canescens, Lehm. Stem villous, erect, nearly simple ; leaves lan- 

 ceolate, se-sile. obtuse, somewliat silky with appressed glossy hairs; the lowest 

 small and scale-like ; corolla large, yellow ; the tube 2-3 times as long as the 

 calyx. — Dry soil in the upper districts. April -May. — Stem 6' -12' high. 

 Corolla smaller than in the preceding. 



6. L. angustifolium, Michx. Strigose; stems 6'- 12' high, single or 

 clustered; leaves l'-2' long, linear; flowei-s dimorphous, one form with 

 bright yellow corollas, 1' long, salver-form, with round denticulate lobes, and 

 a 5-toothed crest at the throat, 2-3 times longer than the calyx, the other 

 small and pale, enclosed in the calyx, and crestless ; seed pitted. — Tennessee, 

 and westward. June. * 



8. MERTENSIA, Roth. Lungwort. 



Calyx 5-parted. Corolla funnel-shaped, 5-lobpd, naked, or with .5 folds in 

 the throat. Stamens partly exserted. Style filiform. Nutlets somewhat 

 fleshy, not flattened at the base. — Smooth or soft hairy perennial herbs, with 



