257 



DESCRIPTION. 



CCCXXXI. E. Umbrawarrensis n.sp. 



"MOUNTAIN BLUE GUM." 



Following is the description : — 



Arbor " Mountain Blue Gum " vocata, subcontorta, ad 40' altitudine, trunco 2' diametro, ligno 

 flavo, duro non durabili, eortice lts'vi, deoidua; foliis maturis obscure yiridibus, sub-tonuibus, petiolatis, 

 Uneari-lanceolatis ad lanceolatis. parviusculis, non 9 cm. excodentibus, 15 mm. latis, vcnis inconspieuis, 

 venis lateralibus angulum 35-40° costa media formantibus ; inflorescentia paniculata, petiolis longuiseulis 

 applanatisqne. umbellis sessilibus ad 7 in capitulo; operculo fere hemispherico calycis tubi dimidium 

 Eequanti ; fructibus fere hemisphcricis ad cylindroideis vel fere piriformibus. pediccllatis minus 3 mm. 

 diametro; margine tenui valvarum capsularum apicibus distinete orificio exsertis. 



" A large rather crooked tree '10 feet high, with a stem up to 2 feet in diameter, wood tough and 

 yellowish and consumed internally by borers. Bark smooth, bluish or white, deciduous " (Jensen). The 

 whole tree more or less glaucous, or hoary-looking. 



Juvenile leaves not seen. 



Milturc leaves dull green, the same colour on both side.-'., rather thin, petiolate, linear-lanceolate 

 to lanceolate, rather small, not exceeding 9 cm. long and 15 mm. broad as seen. Venation not prominent, 

 the lateral veins making an angle of 35—10 degrees with the midrib, the intramarginal vein not far Temoved 

 from the edge. 



Inflorescence. (Although Dr. Jensen, 5th July, 1916, wrote " Tree now in flower," the flowering 

 specimens miscarried, and unripe buds, and a few anthers clinging to an unripe fruit were alone available.) 



Paniculate, with rather long, flattened petioles, expanded at the top, and carrying sessile umbels 

 up to seven in the head. The opercula nearly hemispherical and about half the length of the calyx-tube. 

 Anther broad, opening in parallel slits (round pores when dried). Gland on top, filament at base. 



Fruits nearly hemispherical to cylindroid or almost pear-shaped, pedicellate, small, under 3 mm. in 

 diameter, rim thin, the tips of the valves on the capsules distinctly protruding from the orifice. 



The type is H. I. Jensen, No. 412, 5th July, 1916. 



RANGE. 



Only known from the Northern Territory, and from one locality at present. 

 On top of sandstone residuals near Umbrawarra— dry, barren, flat-topped hills. 

 Umbrawarra is a tin-field situated about 12 miles, as the crow flies, south-vest of Pine 

 Creek. 



B 



