Callitris.] CXXIII. CONIFERiE. 1495- 



apex ovate orbicular or slightly peltate ; anther-cells 2 to 4. Female amenta of 

 6 rarely 8 scales, more or less distinctly arranged at the time of flowering in 

 2 whorls without any enlarged outer empty scales. Ovules (or carpels) several 

 within each scale, in 3 vertical series, sessile and erect. Fruiting-cone globular 

 ovoid or pyramidal, the 6 rarely 8 scales enlarged and hardened, shortly united 

 at the base, apparently engaged in a single whorl, and opening in as many valves, 

 either all equal and strictly valvate, or three alternate ones smaller and 

 sometimes overlapping the others on the margin. Fertile seeds usually few only 

 in each cone, compressed, with a hardened integument, the margins produced 

 into 2 unequal wings or rarely only 1 wing developed, or very rarely a third wing- 

 also prominent on one face, the abortive seeds mostly enlarged and very flat with 

 winged margins ,• in some species there is a more or less prominent central 

 columella usually 3-angular or 3-lobed, and sometimes apparently formed of 

 abortive ovules. Cotyledons 2, rarely 3. — Trees or shrubs, with slender terete 

 or 3 or rarely 4-angled branches. Leaves in whorls of 8 rarely 4, those of the 

 young plants sometimes acioular though short, but generally reduced to minute- 

 acute scales, the decurrent midribs forming the angles of internodes as in 

 Casuarina'. Male amenta usually small, solitary or clustered at the ends of the- 

 branches, and rarely a few lateral ones. Female cones on short thick peduncles 

 or branchlets, solitary or clustered, ripening usually the second year, and 

 sometimes persisting many years after the seeds have fallen. 

 Australian species endemic. 



In the Flora Australiensis the two species here given as Callitris coUimellans, P. v M. and 

 O. verrucosa, B. Br. are placed as varieties of C. robusta, E. Br. Baron von Mueller in his. 

 publications gives specific rank to them but allows C. robusta to lapse. From a strictly bolanicaL 

 point of view I should be 'inclined to reduce the whole of the Queensland represenlatives of the- 

 genus to three species with varieties ; but I consider the plan here adopted will be foucd to be- 

 the most convenient. 



Fruit-cones angular, the junction of the valves prominent. Cones 



. pyramidal, acuminatej about lin. long, 6 to 8-valved. Columella short, 



decurrent at the base and forked at the base of the larger valves. 



Leaves of young trees more or less acicular 1 G. ilciclcayuna. 



Fruit-cone globular, strictly valvate, the junction of the valves neither 

 prominent nor furrowed, the smaller valves usually bearing minute 

 dorsal points. Columella 3-angled, scarcely the height of the smaller 

 valves. Internodes of this and the two following with very obtuse ribs. 2. C. robusta. 



Cone-valves with the dorsal points absent or greatly reduced. Columella 

 rather slender and bluntly angular and often nearly the height of the 

 smaller valves . ... 3. C. columcllaris.. 



Fruit-cones verrucose or rugose outside. Columella broadly angular 

 almost 3-winged| scarcely as high as the smaller valvrs i. C. verrucosa. 



Internodes angular. Cone-valves with minute dorsal points. Co'umella 



very short pyramidal the angles gibbous at the base 5. C. Uluelleri. 



Fruit-cones glo'bulur or oblong, more or less fuvrowed at the junction of 

 the valves, the three smaller valves often slightly overlapping tbe 

 others. 



Cones globular, the inner larger valves dilated at the apex, with the 

 dorsal point near the centre. Columella shorter than the smaller 

 valves, bearing 3 thick broadly divaricate wings 6. C. cupressiformis.. 



Cones ovoid op oblong, the inner larger valves not rnush dilated, with 

 the small dorsal point near the end. Columella like the last or taller, 

 and the wings somewhat obscure 7. C. calcarata. 



1. C. Macleayana (after Sir William Macleay), F. v. M. in Rep. Burd. 

 Exp. Stringy-bark Pine. A tall tree, trunk 2ft. diameter, branches spreading.. 

 Leaves on the young trees in whorls of 4 or even more, rigid spreading linear- 

 triquetrous, pungent-pointed, 2 to 4 lines, those on the branchlets of the old trees 

 reduced to appressed teeth or scales and always in whorls of 8 ; the branchlets 

 very numerous, slender, the angles of the internodes very prominent. Male 

 amenta 2 to 4 lines long (Benth), unknown in C. Parlatorei, F. v. M. Fruit- 

 cones sessile or on short thick peduncles, ovoid-pyramidal, acuminate, very thick at. 



