OXXXVIII. NAIADER. 175 
4. POSIDONIA, König. 
(Caulinia, DC.) 
Flowers hermaphrodite or the terminal one of each spike male or 
semi-abortive. Perianth none. Anthers 3, consisting of a broad 
almost fleshy connective, with 2 short dorsal cells at the base separated 
by the broad thick centre. j i 
often very long, breaking off transversely from the persistent sheathing 
se. Scape leafless below the inflorescence, bearing at the end several 
spikes, each in the axis of a short floral leaf, the peduncle enclosed at 
the base in 2 sheathing bracts, each flower subtended by a small bract 
and 2 bracteoles. 
_ Besides the. Australian 
j species which appears to be endemic, there is one other 
ted to the Mediterranean and to the European shores of the Atlantic. 
her, 2 
stone pedunculate in the axil ofa floral leaflonger than 
S rte sessile with shorter floral leaves, each with a pair 
"iris ing bracts at the base i to 1 in. long. Flowers 6 to 12 on 
pa spike. Braets and bracteoles shorter than the anthers, broadly 
ate or orbicular, peltately attached and very deciduous except the 
uit 
€, 7 to 8 lines long, but not seen quite ripe.—Aschers. in 
Caulinia oceanica, R. Br. Prod. 339, not of DC. 
jo Pina, R. Brown (not labelled in his herb.) ; near George Town, below 
s. E" mark, Gunn, 
ystralia, St. Vincent’s Gulf, F. Mueller 
` Australi , : 
sho a. King George’s Sound, F. Mueller, and probably from the same 
76 R. Brown (not labelled x herb.), Drummond. 
5. ZOSTERA, Linn. 
Flow 
memb ers unisexual, the males and females in alternate rows on the 
floral lect rhachis of a spike enclosed in the sheathing base of the 
laterally 4.2 Crianth none. Male flowers of a single sessile oblong 
of g gi 5, attached 1-celled anther: pollen confervoid. Female flowers 
“ngle carpel, laterally attached near the apex and produced above 
