4 Proceedings of the Roiial Irish Academy. 



apparently continued by oftsets on short liorizontal shoots arising from near 

 the base of the rosette. These featui-es are not found in Ehcdiolo, and would 

 place the plant in the Seda Gcnuina, its rosettes, slender offsets, and divei-se 

 spiny leaves strikingly recalling & pyramidah Praeger from Kansu, which, 

 however, has a dense pyramidal compound inflorescence. The evidence for 

 this perennial character due to lateral branching is not complete, only one 

 such shoot haNing been seen, which was not actually attached, though- 

 apparently it liad Ijeen so. If the growth-form of S. limuloides is as suggested, 

 tlie plant appeai-s to be unique among the Stda Genuina in the liroad attach- 

 ment of its leaves. 



As regards S. oricliakum, though in its leaf-rosettes and lateral tiower- 

 stenis it resembles .Si. Hnniloidfs, yet it diflere materially in its leaves nan-owed 

 at the base and joinefl to the caudex in the usual Sedum manner by a very 

 constricted attachment' : also in the apparently indefinite duration of its 

 shoots, the flower-stems l>eing lateral only and the leaf shoot continuing 

 perennially as in JUmdiola. 



Horny leaf-tips somewhat resembling those of .S. limvlimUa are found in 

 i'olijUdon spiiiaio L. in which, liowever, only a single terminal spine is present. 

 This plant comes close to Sedum, but diHers from the present species in its 

 stent, tall, single terminal flower-stems Itearing elongated very dense racemes. 



.■\nother C'liinese Sediim, of which I have not seen the tyjie. which 

 appears to resemble in some resi)ects the group of species discussed above, is 

 S. Sfhocniaudi K. Haniet. It has leaves arranged in rosettes, and racemose 

 inflorescence, as in S. fimuioides. But wliether it possesses the characters 

 which point to affinity with the Bhodiol" group, or is rather allied to the 

 biennial rosetto-bearing .Scni/xrriroirf/^Ji group (which has characteristically 

 a paniculate in florescence >, cannot be detenuined definitely from the descrip- 

 tion. 



It is clear that in 5. hmuloidfs and S. orichalcnm and possibly in some of 

 the other specie.s mentioned, we have plants which possess some of the 

 characters which distinguish Blif'dioia. and others belonging to the Seda 

 O'cnnino ; further study will be needed to show wliere their affinities lie. 



Series I.SVOLUCKATA. 



Sedum Baileyi sp. nov. 



Herha pereniiis, pusilla, glabra. Conies sterik^ filifoiiues, repentes, epigei 

 vel hypogei, 2-4 cm. longi, internodiis 6-8 mm. longis, nodis folia opposita 



' I have to thank Professor I. Bayley Ba)foar for giriDg me an opportunity of 

 ezaiuining the type specimens of l<. Balfonri and S. orichalcum. 



