18 



this material it appears that the species approaches closely to Gin- 

 gidium antipodum (Anisotome antipoda, J. Hook. Flor. Antarctic, 

 i. 17, t. ix.) ; it differs; however, in longer not so much spreading 

 evidently flat segments of the leaves, in longer teeth termiaating 

 the petiolar sheaths, in not numerous leaflets of the involucres and 

 involucels, in less lengthened teeth of the male calyx and possibly 

 in its oarpological characters, which remain as yet unascertained. 



Nevertheless this and all the allied plants, including Gingidium 

 squarrosum, G. Monroi, G. glaciale, G. procumbens, need yet a more 

 extensive scrutiny in the field, before their specific value can be 

 ascertained and their respective diagnoses can be absolutely fixed. 



The lower petioles of G. Dieffenbachii are free of a vaginal mem- 

 brane towards their summit. The segments of the leaves are about 

 1'" broad or slightly broader, and the majority attains a length of 

 from 2-3". The leaflets of the general involucre are from 4-8'" 

 long, are like those of the involucels placed somewhat unilaterally 

 and number often only three. The teeth of the male calyx are 

 deltoid and semilanceolate and generally less than ^ line long. 



The name of Dr. Ernest Dieffenbach is attached to this plant for 

 commemorating that we owe to this philosopher the first record of 

 the indigenous natural productions of the Chatham-group. 



GiNGIDII sp. 



Mr. Travers collected on grassy places of Chatham-Island a 

 second Gingidium, to which, should it prove new, the name 0. Tra- 

 versii might be given. It seems sufficiently characterized by leaves 

 with a but minutely denticulated sheath and (as far as the material 

 of the collection admits to judge) with two or three rigid segments, 

 which are somewhat broader than those of the foregoing species and 

 streaked by many longitudinal nerves ; the floral leaves are simply 

 linear and undivided, passing into the petiole without any denticula- 

 tion. The leaflets of the general and special involucres are more 

 numerous and narrower than those of G. Dieffenbachii ; the petals 

 roimdish, almost sessile and fully as broad as long. It seems nearest 

 in its affinity to G. Monroi. 



RUBIACE.^. 



C0PK0SM.ffi! sp. 



■ In Mr. Travers's collection are contained two species most probably 

 of this genus from the Chatham-Island ; these can seemingly not be 



