72 Linnean Society. [April 16, 



April 16. 

 Robert Brown, Esq., President, in the Chair. 



Read the conclusion of Mr. Miers's memoir " On the family of 

 Triuriacece." 



Mr. Miers commences his paper by a reference to his establish- 

 ment of the genus Triuris in the 19th volume of the Society's ' Trans- 

 actions,' and to the subsequent publication in the same volume by 

 the late Dr. Gardner of another nearly related genus under the name 

 of Peltophyllum ; but the name of the latter having been derived from 

 a leaf accompanying the specimen which Mr. Miers shows not to 

 have belonged to it, but to be in all probability that of a seedling 

 Cissampelos, he has found it necessary to substitute another generic 

 name, and has redescribed it in the following terms : — 



Hexxiris, Miers. — Peltophijlhtm, Gavdn. 



Char. Gen. Flores dioici. Masc. ignoti. Fern. Perianthium profunde 

 6-partitum, hyalinum, persistens ; laciniis obovatis, praefloratioue val- 

 vatis, singula infra apicem cornu subulate) duplo longiore gyi-ato in- 

 cluso, denium paten tibus, marginibus reflexis. Ovaria indefinite nu- 

 nierosa, minima, densissime in gynsecium aggregata, sessilia, gibboso- 

 ovata, 1-locularia, 1-ovulata. Stylus subulatus, ad faciem internam 

 sublateralis, apice pauluni incrassatus, oblique trnncatus et stigmatosus. 

 Fructus ignotus. — Planta pusilla, Bras'iUensis, diaphana, alhida ; rhizo- 

 inate ^^;roso ; caule recto, simplici, v. subramoso ; foliis bracieiforrnibiis, 

 jtaucis, basilaribus, ovatis, acufis, adpressis, liyalinis; floribus solUariis 

 V. subracemosis ; pedunculis imijloris, basi bracleatis. 



Hexuds Gardneri, Miers. 



Peltophyllum Inteum, Gardn. in Linn. Trans, xix. p. 157. t. 15. 



Hah. in arenosis humidis Prov. Goyaz Brasiliee, Gardner, no. 3570. 



The author next refers to two Ceylonese plants described by 

 Capt. Champion in the Calcutta Journal of Natural History for April 

 1846, with a note by Dr. Gardner, who was at the time much struck 

 by their resemblance to Triuris and his own Peltophyllum ; but both 

 gentlemen recognizing the manifest affinity of the Ceylonese plant 

 to Sciap/iila of Blume, and misled by the position in Urticece assigned 

 to that genus by Dr. Blume, concurred in placing them in one or 

 other of the divisions of that great natural group. Of these two 

 genera Mr. Miers adopts the one, Hyalisma, as sufficiently distinct ; 

 but the second, Aphylleia, he refers without hesitation to Scaiphila, 

 together with two undescribed plants from Sir W. J. Hooker's her- 



