Zoslera.] cv. NAIADACEJ2. 487 



ovate, sessile, "alternating with the ovate germens. Style 1. 

 Sti^-mas 2, elongated, linear. Fruit with 1 seed (bursting vertl- 

 calfy: Wilson). Albumen 0. — N'amed from Z^arnp, a girdle, 

 or ribandj which the leaves somewhat resemble. 



1. Z. marina L. (broad-leaved G.) ; leaves linear 1— 7-nerved, 

 spadix linear without appendages on the margin, achenes striate. 

 JE, B.t. 467. — a. Leaves broader, 3 — 5-nerved, peduncle of 

 the spatha thick, shorter than the spadix. — /3. Leaves narrow 

 1— 3-nerved, peduncle of the spatha slender as long or longer 

 than the spadix. Z. angustifolia Roth. 



a. In the sea ; P. creeks and salt-water ditches, and on the sea- 

 -shore; both common. If.. 7, 8. — Sle/ns various in length, as are 

 the linear obtuse, some\ybat 3 — 7-nerved leaves, which have sheath- 

 ing' bases. Spadix linear, arising from a sheathing portion of the 

 leaf, which thus forms the spatha. Flowers green, borne, in two rows, 

 on one side of the spadix^ quite destitute of perianth Pistils and 

 anthers alternate, generally 2 anthers and then 1 pistil, both ovate, or 

 oblon^-ovate ; the germen terminated by a bipartite style and two fili- 

 form stigmas, ^wMers bursting irregularly. — This plant is used in the 

 packing of glass bottles and earthenware. Li the south of Russia, 

 Pallas tells us, it is found among pottery in old tombs. Beds are 

 frequently made of it, especially in Iceland and the north of Europe : 

 and it is sold in our shops under the name of ''-Alva ( Ulva or Alga) 

 marina^'' for similar purposes. 



2. Z. nana Roth {dwarf G,) ; leaves 1 -nerved, spadix 

 short few-flowered with extra-marginal appendages, achenes 

 smooth, Borr. in E. B. S. t. 2931. 



Dover beach, Poole Harbour, Dorsetshire; Ryde, Isle of Wight. 

 Between Fairlieand Hunterston Point, Ayrshire, covering hundreds 

 of acres. %, 4 — 8. ■ — Leaves slender, 3 — 4 inches or more in length. 

 Spathas oblong-lanceolate, inflat'^d. Fruit faintly striated (Fries). 



Sub-Class IL GLUMACEiE. (Ord. CVI- CVII.) 



owers destitute of time perianth (zcnless the curious urceolate or 

 2 — ^-calved covering to the ovary in some Cyperace^, or the 



>/ 



chaffij 



Conspectus of the Okders, 



lOG. CypERACEiE. Embryo at the base of the albumen and enclosed 



within it. Leaves with entire sheaths. 

 107, Gramine^-e. Embryo lateral, naked. Leaves with split sheaths. 



T 4 



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