HORTUS GRAMINEUS 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 Elymus are- 

 ttarius 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 Elymus 

 arenarius, says " Huic affinis, at in Germania hue usque haud 

 observata, species est Elymus geniculatus. Smith, Britan. i. p. 153, 

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

 dales, bipedales, laxse ; spiculse remotse ; gluma3 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. Ibs. 



Grass, 64 oz. The produce per acre 43572 



80 dr. of grass weigh, when dry 45 7 24502 8 



The produce of the space, ditto - 576 3 



The weightiest by the produce of one acre in drying 19069 8 



64 dr. of grass afford of nutritive matter 507 0400 9 8 

 The produce of the space, ditto 80 5 



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

 ill 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 the 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. 



ARVNDO 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 



