159 
53: B. Zia, Mo aad K., (7, aaa L., var. mznor, Nolte.) 
Spec. 6; Am., N. J., Fla., N. Mex, ; , from Germany and 
Switzerland. A spec. camcbused by a Porter has unusually 
fine floating leaves and fruit. 
54. PP. zosterifolius, Schum., (P. compressus, Fries. non L.) 
Spec. 5; Am., N. J., N. Y.; for., Eu.; *spec. Ex. Herb. Robbins. 
55. Ruppia maritima, L. Spec. 16; Am., N. J. and N. Y. 
to N. Mex.; for., Cuba, Eu., Tasmania and India. 
R. rostrata, Agardh., (probably #. rostel/ata, Koch.) of which 
there is a spec., is not essentially different from R. maritima. 
The POSIDONE# are represented by Postdonia. 
56. FP. oceanica, Koenig. For. sp.; one spec. from Mauri- | 
tius. (P. Caulini, Keenig.; Caulinia oceanica, Cand.; Zostera 
oceantca, L.) 
Of the ZANNICHELLI4 there are Zannichellia and Al/thenia. 
57. Zannichellia palustris, L. Spec., 18; Am., N. Y., Fla. to 
Ind. Terr. and N. W. coast; for., France, India. 
Z. polycarpa, Nolte. A spec. of this contributed by Nolte 
himself from Schleswig-Holstein; not essentially different from 
Z. palustris. 
58. Z. INpiIcAa. A delicate form from the Loo Choo Is., 
under the label “ Z. Zudica, Cham.” I cannot find that Cha- 
misso ever published any such sp., and think it must be wrongly 
referred ; nor can I learn who is the authority for the name. 
Stem capillary; leaves less than # mm. broad; fruit in clus- 
ters of 2 and 3, the clusters sessile, the nutlets about 2 mm. long, 
winged or toothed on the back, otherwise smooth, on pedicels 
3 or 4 mm. long; styles as long as the pedicels; stigmas peltate, 
in the dried spec. looking very thin and scarious. The thread- 
like stems and-leaves, small fruit and long capillary pedicels and 
styles, mark this as a distinct sp. Collected C. Wright in Expd. 
Ringgold and Rodgers, 1853-6. 
59. Althenia filiformis, Petit. For. sp.; spec. 2, France. 
(A. setacea, Petit; Belvalia australis, Del.; Zannichellia aus- 
tralis, Del.) 
Of the ZOSTERE# the Herb. contains Zostera and Phyllospadix. 
60. Zostera marina, L. Spec. 6; Amer., Mass. to Key 
West and California ;. for., France, Italy. 
