458 PROF. OLIVER ON HAMAMELIS AND LOROPETALUM. 



FoTHERGiLLA, L. fil. Stamina circiter 24, antlieris obtusis (loculis in valvulas 2 a medio solutas dehiscentibus in 



F. alnifolia). Folia decidua. (United States.) 

 DiSTYLiXJM, Sieb. et Zucc. Calyx liber, fere ad basin partitus. Stamina 2-8 (antherarum dehisceutia vix valvata in 



1). racemoso), connectivo producto. Ovarium superum. Floras hermapkroditi \. abortu imisexuales. Folia 



persistentia. (Japan, Khasia?.) 

 Sycopsis, Oliv. Calyx tubo ovarium arete cingente, lobis quasi superis. (Stamina in S. Griffithiana 8, antberis 



apice breviter productis.) Ovarium semiinferum. Flores abortu unisexuales. Folia persistentia. (Khasia.) 



** Flores corolla vel squamulis cahjcis lobis alternantibiis donati. 

 ■\ Petala elongato-Unearia, lanceolata v. spathtdata. 



CoRYLOPSis, Sieb. et Zucc. Flores pentameri. Antheree muticce (loculis in valvulas 2 a medio solutas dehiscenti- 

 bus in C. himalayana *). Folia decidua. Flores amentacei. (Japan, E. Himalaya, and Khasia.) 



DicoRYPHE, Thouars. Flores tetrameri (v. quandoque pentameri). Stamina 4-5 (antherarum loculis in valvulam 

 unicam ab externo solutam dehiscentibus, antheris acutiusculis, in D. stipulacea, fide Tulasne t). Calyx tubo 

 cylindrico. (Madagascar.) 



Hamamelis, L. Flores tetrameri. Calyx profunde lobatus v. partitus. Antheree muticse loculis in valvulam unicam 

 ab externo solutam dehiscentibus. Folia decidua, venulis secundariis rectis parallelis. (United States, Japan.) 



Trichocladus, Pers. Flores pentameri. Antheree mucronatse loculis in valvulam ab externo solutam dehiscentibus. 

 (South Africa.) 



LoROPETALUM, R. Br. Flores tetrameri. Antherse loculis in valvulas 2 a medio solutas dehiscentibus, connectivo 

 producto. Folia persistentia, venulis reticulatis. (China, Khasia.) 



ft Petala squamceformia, cahjcis lobis alternantia. 



Tetrathyrium, Benth. Antheree loculis in valvulas 2 a medio solutas dehiscentibus, connectivo producto. Stigma 



subulatum. (Hong Kong.) 

 EusTiGMA, Card, et Champ. Antherse obtusaj loculis in valvulas 2 vix aequales a medio solutas dehiscentibus. 



Stigma latum, papilloso-lobatum. (Hong Kong.) 



I have not seen a specimen of any Diconjphe. Tulasne, in " Eragmenta Florae Ma- 

 dagascariensis"J, describes several species, one (D. stipulacea, J. St.-HUaire) very 

 fuUy. 



The mode of dehiscence of the anthers has been employed by aiithors as a sectional 

 character in grouping the genera, but it does not appear sufficiently constant in closely 

 allied forms to be thus prominently applied. I have examined the anthers of a number 

 of species contained in Sir W. J. Hooker's herbarium, and have noted the character 

 which the genera present in this respect in the above conspectus. The transverse 

 separation of the two vertically opening valves above and below from the upper and lower 

 margins of their cell is sometimes inconspicuous, or the valves may separate distinctly 

 below, and scarcely at all above. In Farrotia Jacquemontiana, for example, the anthers 



* Siebold and Zuccarini describe two other species, C. paucifiora and C. spicata. The anthers in the latter are 

 said to open "loculis longitudinaliter univalvibus." 



■\ Ann. Soc. Nat. ser. iv. t. viii. p. 143. % Ann. Soc. Nat. I. c. 



