72 



DESCRIPTION. 



CDXIX. x E. Laiigii Maiden and Blakely, n.sp. 



Arbor circiter 40' alta ; ramis gracilibus, pendulis ; ramulis semi-teretibus ; foliis maturis alternatis, 

 petiolatis, angusto-lanceolatis vel falcato-lanceolatis, 8-18 cm. longis, 6-20 mm. latis ; inflorescentia in 

 umbellis axillaribus 5-6 floris ; floribus pedicellatis : alabastris cylindraceo-urceolatis, rugulosis ; calycis 

 tubo tenui, circiter 9 mm. longo ; operculo conico vel rostrato, 4-5 mm. longo ; antheris (Macrantherae) 

 i rregularibus, loculis lateralibus, longitudinaliter deliiscentibus ; fructu ovoideo vel cylindroideo-ureolato, 

 7-10 mm. longo, 5-7 mm. in diametro. 



A supposed natural hybrid with E. cladocalyx as one of the parents. A beautiful shaped tree, about 

 40 feet high, with slender, pendulous branches, and semi-terete, reddish-brown branchlets. 



Juvenile leaves not seen. 



Mature leaves alternate, petiolate, irregularly narrow-lanceolate to falcate-lanceolate, acuminate, 

 sometimes terminating in a slender point "7-12 mm. long, light green and glossy on both surfaces, but 

 usually paler beneath ; venation not very distinct, except the median nerve, which is distinctly channelled 

 above, flat and faintly channelled beneath, pale yellow or sometimes purple-brown ; lateral veins few and 

 distant, radiating at an angle of 20-30° with the midrib ; intramarginal vein usually close to the slightly 

 revolute margin, but sometimes rather distant from it, 8-18 cm. long, 6-20 broad; petioles slender 5 

 compressed-terete, 12-25 mm. long. 



Inflorescence in axillary umbels of 5-6 pedicellate flowers; the peduncles slender, scarcely terete, 

 10-14 mm. long. Buds pedicellate, cylindrical-urceolate, rugulose, greenish-white; calyx-tube thin, about 

 9 mm. long ; operculum conical to rostrate, 4-5 mm. long. Anthers (Macrantherae) very irregular, 

 sometimes oblique on the filament as in Terminales, but the cells are lateral, either somewhat cordate or 

 long and narrow, with or without a small terminal gland. Floral disc obscure; style moderately thick, 

 with a dark-coloured capitate stigma. 



Fruit ovoid to cylindroid-urceolate, slightly rugulose or sometimes quite smooth, usually with a 

 small orifice and crowned with the slightly enlarged stamina! ring, 7-10 mm. long, 5-7 mm. in diameter; 

 valves deeply sunk. The fruits are somewhat like those of E. cladocalyx, but they are not so conspicuously 

 costate. 



This tree was brought under notice by Mr. P. R. H. St. John in 1921. The 

 following is an extract from his letter :— " I send you specimens of an uncommon form 

 of E. cladocalyx, which I found recently in a plantation some miles long, mainly of 

 Sugar Gums, on Dr. Lang's Litanga Station, Lismore, Victoria. This form oi 

 E. cladocalyx is a beautiful tree, and is quite distinct from the rest of the trees in the 

 plantation ; the mam difference being in the long narrow leaves and in the smaller 

 fruits." Later Mr. St. John informed me (W.F.B.) that the tree was raised from 

 seed in July, 1888, and is about 40 feet high. The origin of the seed is unknown. 



Named in honour of Dr. P. H. Lang, " Litanga," Lismore, Victoria, who has 

 taken a keen interest in the cultivation of Eucalyptus. Mr. St. John informed me 

 (J.H.M.) that Dr. Lang has about 25 miles of Eucalyptus plantation, and in his house 

 paddock there are over 100 different species. 



