BORBAGINACE^E. (BORAGE FAMILY.) 361 



7. LITHOSPERMUM, L. CROMWELL. 



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

 5-lobed, smooth, gibbous or hairy in the throat. Anthers oblong, 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 roughened. 



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

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

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

 March - April. Introduced. (Stem 6' - 18' high. Leaves 1' - 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 others 

 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 acuminate; 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 

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

 May. Stem 1-H high. Leaves 1'- 2' long. Corolla 6" - 8" long. Root 

 very long. 



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

 ceolate, sessile, obtuse, somewhat 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; flowers 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-lobed, naked, or with 5 folds in 

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

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



