72 TRIANDRIA DIGYNIA. [CL. III. 



an inch long : chaff-scales united at the base, three-ribbed, covered with 

 long, close, white hairs. Perennial : flowers in July : grows on some 

 of the highest mountains of Scotland. Discovered by Mr. R. Brown on 

 Loch-na-gar, in Aberdeenshire ; Clova mountains, Forfarshire. Eng. 

 Bot. vol. xvi. pi. 1126. Eng. El, vol. i. p. 81. 107. 



3. A. agrestis. Slender Fox-tail-grass. Straw erect, roughish above ; 

 panicle spiked, cylindrical, tapering at the end ; chaff-scales acute, nearly 



bare ; awn twice the length of the calyx. Root fibrous: straws about 



two feet high : leaves rough above : spike slender, three inches long, 

 purplish : chaff-scales lance-shaped. Annual : flowers in July : grows 

 in cultivated fields, and by way-sides. Eng. Bot. vol. xii. pi. 848. Eng. 

 Fl. vol. i. p. 81. 108. 



4. A. bnlbosus. Bulbous Fox-lail-grass . Straw erect ; spike simple ; 

 chaff-scales separate, linear, acute, downy ; root bulbous. Root bul- 

 bous : straws erect, smooth : leaves narrow, striated : spike dark green : 

 chaff-scales narrow, with the keel and ribs fringed : husk bluntish, its 

 awn twice the length of the calyx. Perennial : flowers in July : grows 

 in salt marshes in England : rare. Near Yarmouth and Weymouth. 

 Eng. Bot. vol. xviii. pi. 1249. Eng. Fl. vol. i. p. 82. 109. 



5. A. geniculdtus. Floating Fox-tail-grass. Straw ascending, bent 

 at the joints ; panicle spiked, cylindrical ; chaff-scales united at the 



base, abrupt, fringed ; awn twice the length of the calyx. Root 



fibrous : straw decumbent at the base : leaves broader and shorter than 

 in the last : spikes an inch and a-half long : chaff-scales obtuse, purple, 

 strongly fringed on the keel : husk abrupt, shorter than the calyx : awn 

 twice the length of the calyx. Perennial : flowers in June and July : 

 grows in ditches and watery places: common. Eng. Bot. vol. xviii. pi. 

 1250. Eng. Fl. vol. i. p. 83. 110. 



6. A. futvus. Orange-spiked Fox-tail-grass. Straw ascending, bent 

 at the joints ; panicle spiked, cylindrical ; chaff-scales united at the 



base, obtuse, fringed ; awn as long as the calyx. This is hardly distinct 



from the last, the comparative length of the awn affording the only 

 remarkable difference. Perennial : flowers in June and July :*grows in 

 ditches and watery places : not unfrequent. Eng. Bot. pi. 1467. Eng. 

 Fl. vol. i. p. 83. 111. 



16. KNA'PPIA. KNAPPIA. 



Calyx one-flowered, of two nearly equal, keeled, egg-shaped, 

 abrupt, awnless chaff-scales. Corolla of two unequal, inversely 

 egg-shaped, membranous, hairy, fringed, awnless husks, shorter 

 than the calyx. Filaments hair-like, twice the length of the calyx ; 

 anthers oblong, cleft at both ends. Germen minute, roundish. 

 Styles short, stigmas long, cylindrical, acute, downy. Seed 

 loose, egg-shaped, covered by the husks. Named after Mr. 

 Knapp. 32. 



1. R. agrottidea. Early Knappia. Root fibrous : stems from one 



to three inches high, erect, slender, triangular : leaves short, channelled, 

 at the base of the stem : flowers purplish, nearly sessile. Annual : 

 flowers in March and April : grows in sandy pastures by the sea-shore, 

 in the south of England, Wales, and in Ireland : rare. Eng. Bot. vol. 

 xvi. pi. 1127. Eng. Fl. vol. i. p. 84. 112. 



