26 IIUTACE.E. 



Citrus Atcranfium Hayata Gcn. Ind. p. 11, (noii Linn.) 



Hab. Shintiku, Tuilioku, cult. 



NoM. Jai'. Sekhan "^^. Klnhunenhd, TOmihan. 



NoTE : Colour of the skin is like that of jSCo. 1.31 iind tliat of the jiulp, 

 No. 131 in Klin. et Val. Cod. de Coul. Branclics urc somcwhat likc those 

 of C. Daidai, but less ascending tlian thosc of C. nohilis var. poonensis. 

 Flowcrs in tlio middlc of May. 



Valencia late, Bahia, Wasldngton Navel and THOJirsoN's Imjyfoved Navel 

 arc all forms of Gitrus sinensis Osbp:ck. 



Citms Tankan Hayata sp. nov. (Fig. 17 ct 18-6) Frutcx 2^ m. altus 3^ m. 

 latus, rami validi sed divaricati inclinati ascnedentes. Folia oblongo-lanceolata 

 coriacea 9-10 cm. longa 3^ cm. lata apicc triangulari-acuminata ad summum 

 obtusissima et mucronata basi acuto-cuncata marginc versus apiccm crenata, petio- 

 lis 1 cm. longis angustissime alatis vel haud alatis. Eami ad axillas foliorum 

 spinescentes, spinis 5 mm. longis. Fructus subglobosus 6 cm. longus totiusriuc 

 latus ; pericarpio plus minus stricto fere lasvi xqI rugoso : carnibus diilcibus : 

 medulla partim solida partim cava. 



Note : Colour of the skin is like that of Xo. 1.3G and that of the pulp 

 No. 151 in IvLiN. et Val. Code des Coul. 



The flowcrs are larger, the petals are broader and the leaves arc lcss obtuse 

 in this species, than in C. nohilis var. poonensis. The lcaves of Tanhan 

 are more or lcss minutely and elevately dotted above in the living spccimens. 

 There is a distinct articulation between the ovary and styh^. Calyx-lobes of 

 Tanhan are acute at the apex. Flowers of this sx^ecics arc a little larger thau 

 those of C. nohilis var. poonensis, but of nearly the same characters of the latter. 

 The fruits with a ncarly tight skin and a solid core somewhat resemble those of 

 C. sinensis. The branclics too indicate the characters of tliosc of thc latter. 



Thcre arc thrce forms. They are : — 



C. Tankan proper. Fruits broadly globose 6 cm. in lcngtli, 7 cm. in 

 width. Thc trce, when Cj[uitc ohl, attains a hcight of nearly 4 m., the branches 

 sjwading ovcr 5 m. in width. 



Hab. 8]iintiku, Shirin, ■\Vash6shil. 



XoM. Jap. Tanhan %}i\i. 



