CL.V.] PENTANDRIA MONOGYNIA. 115 



Perennial : flowers in June and July : grows in marshy places and 

 ditches : common. Eng. Bot. vol. xxviii. pi. 1973. Eng. Fl. vol. i. 

 p. 250. 285. 



2. AT. caespitfsa. Tufted Water Scorpion-grass. Calyx funnel-shaped, 

 with broad, spreading segments ; leaves covered with erect bristles; root 



fibrous. Stems about a foot high, rooting at the base : corolla paler 



and smaller than in the last species : the whole plant weaker. Peren- 

 nial : flowers in June and July: grows in watery places: common. 

 Eng. Bot. Suppl. pi. 2661. Eng. Fl. vol. i. p. 251. 286. 



3. 31. alpes'tris. Rock Scorpion-grass. Calyx deeply five-cleft, co- 

 vered with erect hairs ; leaves hairy, root-leaves half the length of the 



stalks ; root fibrous. Stems from three to five inches high : clusters 



dense : corolla large and blue. Perennial : flowers in July and August : 

 grows on Ben Lawers and other Highland mountains : rare. Eng. Bot. 

 vol. xxxvi. pi. 2559. Eng. Fl. vol. i. p. 253. 287. 



4. M. sylviitica. Wood Srorpimi-grass. Fruit smooth ; calyx deeply 

 five-cleft, with spreading hooked bristles, when in fruit egg-shaped, 

 shorter than the spreading flower-stalks ; limb of the corolla flat, longer 



than the tube ; root-leaves on short dilated stalks. Perennial : flowers 



in June and July : grows in dry shady places : common. Eng. Bot. 

 Suppl. pi. 2630. Bnt. Fl. 4th ed. p. 91. 288. 



5. M. arvtnsis. Common Field Scorpion-grass. Fruit smooth ; calyx 

 cleft half-way, with spreading hooked bristles, when in fruit egg-shaped, 

 shorter than the spreading flower-stalks ; limb of the corolla concave, 



equal in length to the tube. Annual : flowers through the summer 



and part of autumn : grows in cultivated ground, and in general in loose 

 soil : common. Eng. Bot. Suppl. pi. 2629. Brit. Fl. p. 91. 289. 



6. M.collina. Earlu Field Scorpion-grass. Fruit smooth ; calyx deeply 

 cleft, with spreading hooked bristles, when in fruit bulging at the base, 

 open, equal in length to the spreading flower-stalks ; limb of the corolla 



concave, shorter than the tube ; one remote axillar flower. Annual : 



flowers in April and May : grows in dry pastures, sandy or gravelly 

 open soil, and on wall tops: common. Eng. Bot. Suppl. pi. 2629. 290. 



7. M. rersicolor. Yellow and Blue Scorpion-grass. Calyx deeply five- 

 cleft, covered with spreading hairs ; leaves narrow, oblong, hairy ; clus- 

 ters long, stalked, without a remote flower. Root fibrous : stem three 



or four inches high : corolla small, blue with a yellow throat. Annual : 

 flowers in June and July : grows in dry waste places, on walls, &c. 

 common. Eng. Bot. pl.^480. fig. 1. Eng. Ft. vol. i. p. 254. 291. 



2. LITHOSPE'RMUM. CROMWELL 



Calyx inferior, of one leaf, oblong, deeply five-cleft; segments 

 acute, equal, nearly erect. Corolla of one petal, funnel-shaped; 

 tube open. Filaments very short ; anthers oblong, concealed in 

 the tube. Germens four. Style thread -shaped, shorter than the 

 tube ; stigma obtuse, notched. Seeds four, egg-shaped, pointed, 

 hard. Named from lithos, a stone, and sperma, seed. 87. 



1. L. offidndle. Common Cromwell. Graymill. Corolla little longer 



than the calyx ; leaves lance-shaped, rather acute. Root tapering, 



whitish : stem about two feet high : leaves greyish-green : corolla pale- 



