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4. T. bulbosum, L. Asp. not found in Am.,, spec. 4; one 
in fruit, coll. by C. Wright at the Cape of Good Hope, in Ring- 
gold and Rodgers’ Expd., 1853-’56. Two from Corsica and 
Malta are labelled 7. Barrelieri, Lois., a syn. of J: bulbosum, L. 
5. TI. procerum, R. Br. For. sp.; one spec. from Tasmania. 
6. T. centrocarpum, Hook. For. sp. Several individuals in 
fruit of this pretty little sp. coll. at Tasmania, Ex. Herb. Hooker. 
7. T. flaccidum, A. Cunningham. For. sp.; one spec. con- 
tributed by Dr. Asa Gray, coll. Raoul, New Zealand. 
8. Scheuchzeria palustris, L. Spec. 23; Am., from Mass., 
N, Y., N. J. and Pa.; for., from Sweden, Norway, Russia and 
Switzerland. 
The tribe APONOGETONE# is represented by Apfonogeton, 
Thunb., and Ouvirandra. Thou. : 
Ouvirandra differs from Aponogeton only in having the paren- 
chyma between the nerves of the leaf deficient, and is perhaps to 
be considered a sub-genus rather than distinct from Aponogeton. 
9. Aponogeton leptostachyum. For.sp.; spec. 1, coll. in East 
Africa. 
10. A. monostachyum, L. For. sp. (Saururus natans, L.) 
A fine spec. in fruit from Ceylon. The fruit is on a long crowded 
spike, as in Saururus. 
11. A. distachyum, Thunb. For. sp.; spec. 2; from Edin- 
burgh Bot. Garden. 
12. Ouvirandra fenestralis, Thomas. For. sp.; one spec. 
from Madagascar of this curious plant, consisting of two of the 
skeleton leaves by which it is distinguished. 
The tribe POTAME is represented by its two genera, Pota- 
mogeton and Ruppia. 
13. * Potamogeton acutifolius, Link. For. sp.; one spec, 
England, coll. and com., Mr. A. Bennett, of Croydon. This sp. 
is very similar to P. zosterifolius, Schum. 
14. P.amplifolius, Tuckerm. Spec. 11; N. J., N. Y., N. 
Eng., Lake Superior, Ky. *Also spec. Ex. Herb. Dr. Robbins. 
15. P. Claytoni, Tuckerm. Spec. from N. Eng., N. CY, 
N.2}4S: G. *Spec., Ex, Herb. Dr. Robbins: 
16...P., crispus, L. Spec. 85, Am... ftom N, J:¢ ; for., from 
Gr. Brit., Cont. Eu., Loo Choo Is., India. 
