40 ELEMENTS OF BOTANY. 



I. MERTENSIA, LUNGWORT. 



Calyx short, deeply 5-cleft or 5-parted. Corolla somewhat 

 trumpet-shaped or funnel-shaped, often with 5 small folds or 

 ridges in the throat, between the points of insertion of the 

 stamens. Style long and slender. Nutlets smooth, or at 

 length becoming wrinkled. Leaves generally pale, smooth, 

 and entire. Perennial herbs. 



(M. Virginica), Lungwort, Blue Bells. Smooth, nearly 

 erect, 1-1 1 ft. high; root-leaves large, obovate, or nearly so, and 

 petioled, stem-leaves smaller, sessile ; flowers clustered, corolla 

 nearly trumpet-shaped, varying with age from lilac to blue (or 

 occasionally white), stamens with slender filaments projecting 

 beyond the corolla-tube. 



II. LITHOSPERMUM, GROMWBLL, PUCCOOK 



Corolla funnel-shaped or salver-shaped, with or without 

 folds or appendages at the mouth of the tube; the limb 

 6-cleft, its divisions rounded. Stamens included in the 

 corolla-tube, the anthers nearly sessile. Nutlets either 

 smooth or wrinkled, generally very hard and bony. Herbs, 

 with stout, usually reddish roots ; flowers appearing axillary 

 and solitary or else in leafy-bracted spikes. 



a. (L. arvense). Corn Gromwell. A rough weed, about 1 ft. 

 high, with narrowly lanceolate leaves and inconspicuous whitish 

 flowers in the upper leaf-axils ; corolla hardly extending beyond the 

 calyx, without appendages in the throat ; nutlets rough or wrinkled 

 and dull. 



b. (L. hirtum). Hairy Puccoon. Rough-hairy, 1-2 ft. high; 

 corolla deep orange-yellow, with appendages in the throat and clad 

 with wool within at the bottom ; flowers handsome, peduncled, in a 

 crowded cluster. Perennial. 



c. (L. canescens), Pt'ccooN, Indian Paint. Clothed with 

 soft hairs 8-12 in. high ; flowers axillary and sessile ; corolla append- 

 aged, not woolly within, showy, orange-yellow. 



LABIAT.^;, MINT FAIMILY. 



Mostly herbs, with square stems and opposite, more or less 

 aromatic leaves, without stipules. Flowers generally in 



