102 PLANT HABITS AND HABITATS IN THE 



Acacia hakeoides is marked by its upright phyllodia, 5 to 10 cm. in 

 length and about 4 mm. wide. A. sentis is a small tree with phyllodia 

 about 20 mm. in length. It has spinescent stipules. A. suhlanata 

 (plate 27a) is also a small shrub, fairly numerous, characterized by 

 having phyllodia triangular in form and about 2 mm., in diameter. 

 Bursaria spinosa is a small shrub, 1.5 to 2 meters in height and with 

 leaves occurring in groups. The leaves are fairly numerous and are 2 

 to 4 cm. in length. The Quorn species appears not to be armed. 

 Cassia eremopMla, a shrub, is characterized by linear leaflets which 

 arise from a phyllode-like leaf-stalk. In C. sturtii the leaflets are 

 numerous, 6 to 10, and are about 10 mm. in length. The leaves of 

 this species can also be said to be abundant. Eutaxia empetrifoUa 

 (plate 27b) is a low shrub with linear leaves, about 3 mm. long, but 

 numerous. Glycine clandestina, a twining herb with slender leaflets, 

 was one of the very few climbers which were seen at Quorn. Helichry- 

 sum spiculatum is a leafy herb clothed with cottony pubescence and is 

 fairly abundant. Senecio anethifolius is a small shrub with numerous 

 linear lanceolate leaves, and is also rather abundant. Templetonia 

 aculeata is a low, rigid shrub with simple leaves, about 10 mm. in length. 

 It has prickly stipules and thus is one of the few armed species in the 

 vicinity of Quorn. 



All of the species whose salient characters have just been sketched 

 were growing in vacant fields and by the roadside about 4 miles north 

 of Quorn along the Mount Arden road. The valley at this place is 

 fairly level, but as one goes farther north it ascends somewhat, be- 

 comes narrower, and by the time Mount Arden is reached, about 4 

 miles farther, trees characteristic of the higher hills are encountered. 

 Here, and especially at Warren's Gorge (plate 26b), one finds small 

 forests of the pine, Callitris rohusta, at a place where a small stream 

 breaks through, making the only means of access to the rounded 

 slate hills beyond. The main ridge of the mountain through which 

 the gorge runs rises steeply at one side and the shale hills ascend 

 gradually on the other. The latter is the habitat of Callitris rohusta, 

 but it also occurs on the mountain itself. On certain of the slopes, 

 however, mallee {Eucalyptus odorata and E. oleosa) occur on the upper 

 reaches, while the middle of the slope is occupied by Zygophyllum sp., 

 below which is Callitris, reaching down to Eucalyptus leucoxylon var. 

 pauperita by the stream. There are no shrubs and very little grass 

 or other annuals in the Callitris community, which extends close to 

 the stream. Somewhat upstream from Warren's Gorge, and growing 

 on tumbled rocks low on the hillside above it, is Sarcostemma australe. 

 This is a leafless species of Asclepiadeae which here hangs and sprawls 

 over the rocks with a most weird effect. 



At certain places along the Mount Arden road, which passes up a 

 narrowing and ascending valley with characteristic changes in the 

 vegetation as above suggested, one finds patches of the introduced 



