257 



DESCRIPTION. 



CCCXXXI. E. Umbrawarrensis n.sp. 



"MOUNTAIN BLUE GUM." 



Following is the description : — 



Arbor " Mountain Blue Gum " vocata, subcontorta, ad 4-0' altitudine, trunco 2' diametro, ligno 

 flavo, duro non durabili, cortice lrevi, decidua; foliis maturis obscure viridibus, sub-tenuibus, petiolatis, 

 lineari-lanceolatis ad lanceolatis. parviusculis, non 9 cm. excedentibus, 15 mm. latis, vcnis inconspiouis, 

 venis lateralibus angulum 35-40° costa media formantibus ; infloreseentia paniculata, petiolis longuisculis 

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

 tequanti; fruetibus fere heinisphcricis ad cylindroideis vel fere piriformibus, pediccllatis minus 3 mm. . 

 diametro : margine teiiui valvarum capsularum apicibus distincte orificio exsertis. 



" A large rather crooked tree 40 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 ferea more or less glaucous, or hoary-looking. 



Juvenile leaves not seen. 



Mature leaves dull green, the same colour on both sides, rather thin, petiolate, linear-lanceolate 

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

 the lateral veins making an angle of 35-40 degrees with the midrib, the intramarginal vein not far removed 

 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 lon;r, flattened petioles, expanded at the top, and carrying sessile umbels 

 up to seven in tin' 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 Dearly hemispherical to cylindroid or almost pear-shaped, pedicellate, small, under 3 mm. in 

 diameter, rim thin, the tips of the valves of 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 bills. 

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

 Creek. 



B ~~* 



