HORTUS GUAMINEUS WOBURNENSIS. 371 



the other constituents of the plant, while the slender culms, dis- 

 tant florets, or loose spike, destitute of pubescence, with thin 

 leaves, indicate the contrary. This is the case with the two 

 species now spoken of; the nutritive matter of the Elj/mus are- 

 Tiarius contains more than one-third of its weight of saccharine 

 matter, and that of the Elymus geniculatus contains but a very 

 small proportion. 



M. Schrader, in the Flora Germanica, describing the E/ijmus 

 arenarius, says — " Huic affinis, at in Germania hue usque baud 

 observata, species est Eli/mus geniculatus. Smith, Britan. i. p. 153, 

 cui culmi altiores, graciliores ; folia angustiora ; spicas sesquipe- 

 dales, bipedales, laxae ; spiculse remotae ; glurase calicinse lineari- 

 setacese flosculis longiores." 



At the time of flowering, the produce of the Elymus arenarius 

 on a clayey loam is — 



Produce per Acre, 

 dr. qr. lbs. 



Grass, 64 oz. The produce per acre - 43572 



80 dr. of grass weigh, when dry - 45 > o^r no o n 

 The produce of the space, ditto - 576 3 



The weight lost by the produce of one acre in drying 19069 8 



64 dr. of grass afford of nutritive matter 5 7 o^ao 9 o 

 The produce of the space, ditto - 80 3 



This species is therefore greatly superior to the above in pro- 

 duce and nutritive properties, but neither appears to have merits 

 sufficient to recommend it for cultivation ; for even though they 

 were early in the produce of fine foliage, and grew rapidly after 

 being cut, their strong creeping roots, which exhaust th^ soil very 

 much, would preclude their introduction on the farm. 



The knee-jointed, or pendulous lyme-grass, flowers in the se- 

 cond week of July. The sea lyme-grass flowers about a week 

 later. The seed is perfected in about three weeks after the time 

 of flowering. 



ARUNDO arenaria. Sea-reed, Marram, Starr, or Bent. 



Specific character: Calyx single-flowered, longer than the corolla ; 

 panicle spiked; flowers erect, slightly awned ; leaves involute, 

 sharp-pointed. Sm. Engl. Fl. i. p. 171. — Fig. 1. Calyx. 

 2. Floret. 3. Germen, Styles, and Nectary, magnified. 



Obs. — Root jointed, creeping very extensively; whole plant 



