178 HORN EXPEDITION — BOTANY. 



George Gill Range (E. Giles). Kt-ichauft' Range (Keiiipe) and Palm Creek off 

 Glen of Palms !. Mount Sonder and Heavitree Gap !. Always gregarious and 

 saxatile. 



Macrozainia Macdonnelli was the name given to a cycad, collected by Stuart 

 in Central Australia, by F. v. M. in Frag. Phyt. Aust., vol. ii., p. 179, and 

 attributed to the locality. River Neale. Stuart in his " Journals of Explorations " 

 makes no reference to the plant as from there, but at p. 157 (2nd edit.), lie 

 describes a cycad calling it a palm tree, which leaves no doubt that the original 

 specimens came from Brinkley Bluff, where I have actual knowledge of its 

 occurrence. Moreover, F. v. M. in the " Enumeration of the Plants," p. .505, op. 

 cif., states that " a cycadeous plant occurs on McDonnell Range," and makes no 

 allusion to the River Neale, which is several hundreds of miles south of the most 

 southerly station actually known. By this correction the species is restricted to 

 the George Gill, Krichauff and McDonnell Ranges. 



Stems attain to four feet high with a diameter of eighteen inches, the longer 

 leaves measure ten feet in length, the petioles trigonal and concave above, and 

 bear from ninety to one hundred pairs of leaflets. The leaflets are flat, margin 

 entire, the larger ones about one foot long and one-quarter inch wide, the lower 

 leaflets gradually shortened, but none reduced to spines, the basal eighteen 

 inches of the petiole without leaflets, attenuated to a slight pungent point, the 

 upper surface obscurely seven- to nine-veined, and the interstitial spaces with 

 distant granulosa streaks ; the base of the leaflet with a relatively large articular 

 callosity, suddenly contracted above, the insertion marginal and axial. 



Male cones ellipsoid-cylindrical, twelve inches long by three and a quarter 

 inches wide ; antheriferous scales very numerous and thick, the lower ones blunt 

 and abbreviated, those towards the middle short-pointed, those towards the sunnnit 

 with vertically ascendent apices, the longest of which is three-quarters of an inch 

 and the attenuated point is somewhat pungent. This species was associated by 

 Mr. Bentham, Fl. Austral., vol. vi., p. 253, with E. Frascri, but it differs from it 

 and therefore from E. spiralis by the rachis not being raised between the piniia\ 

 The male cones of E. Macdoiuielli, hitherto undescribed, are equally large as those 

 of E. Fraseri ; but its upper scales have not the long subulose tips of that species. 



HYDROCHARIDE/E. 



Ottelia ovalifolia, L. C. Richard. Rock pool in Reedy Creek Gorge, 

 George Gill Range !. All the plants exhibit an oxtremo of dimorphism, which 



