294 HORTUS GRAMINEUS WOBURNENSIS. 



years : no manure had been applied, the ground was merely 

 pointed over in the spring, and kept free of weeds during the 

 season; the seed which was naturally shed by the plants was 

 sufficient. But with respect to the annual grasses that afforded 

 a much greater proportion of nutritive matter, the case proved 

 very different, as the Bromus arvetisis, Phalaris canariensis, Loliiim 

 temuleutum, and others, hardly afforded half the usual produce 

 the second year of cultivation, on the same spot, though manure 

 was applied. 



It flowers in the second and third weeks of July, when sown in 

 the preceding autumn, and the seed is ripe about the middle of 

 August ; but it continues to flower till the cold prevents it. 



DIGITARIA sanguinalis. Slender-spiked Finger-grass, Cock's- 

 foot Finger-grass. 



Panicum sangiiinale. Slender-spiked Panic-grass. Hort. Gram. 

 Fol. 175; Engl. Bot. 849; Curt. Lend. fasc. 4, t. 7 ; Fl. 

 Rust. t. 78. 



Syntherisma vulgaie. (Flo. Germ.) 



Specific character: Leaves and their sheaths somewhat hairy; 

 flowers in pairs ; calyx rough at the edges of its largest valve 

 only. Sm. Engl. Fl. i. p. 96. 



Ql)s, — Dr. Withering observes, that the knots within the base 

 of the spikelets, and the dots on the sheaths of the leaves, 

 do not appear on the figure of the Flora Lond.; but the 

 former is mentioned, and the latter expressed in the figure of 

 Leers ; so that a doubt still remains, whether this plant may 

 not be the Panicumjili forme. In the Flora Germanica these 

 two species are referred to the genus syntherisma, under the 

 following characters : " Leaves and sheaths somewhat hairy, 

 florets oblong, somewhat pubescent on the margin. P. san- 

 guinale, E. Bot," — " Leaves and sheaths smooth, florets 

 ovate. Syntherisma glabrum." — Panicum sanguinale of Leers, 

 above referred to ; and the Digitaria Jiliformis, in Koel. Gram. 

 These appear to be excellent specific distinctions. But all 

 doubt is cleared away by consulting the Enghsh Flora above 

 referred to. 

 German, Gemeine-Bluthirse. 

 Native of Britain. Root annual. 



Experiments. — At the time of flowering the produce from a 

 sandy soil is — 



