R. H. COMPTON : GYMNOSPERMS. 



43a 



Rami lioi-Izontalcs. EamuU cylindracei fastigiati irregulariter furcati cnin 

 foliis G-8 mm. luti. Folia verticillata tetramera orJinibns 8 erecto-patentia 

 imltricata rio-kia incurvata basi lata sessilia non decurrentia externe carmata, 

 interne plana, 5-7 nun. long. 2-2-5 mm. lat. acuta margine minute ciliuto.. 



Strobili masculi in ramulis longis terminalcs ovoidei 10-12 mm. long. 

 5-G mm. lat., verticillis sporopliyllium tetramoris- circa 8; sporophyllia foliis 

 similia, sed b:tsi latiora, maxima 5 mm. long. 3 mm. lat., dense imbrieati, 



basi sj)orangia sessilia ferentes. 



/ 



libus termin;ilos late ovoidei, verticillis tetrameris 2 ; squamae exteriores non 

 concmrroutes, interiores confertjie angustro crassge interne carinatffi 1 cm. 



lonn*. proj)C apicem appendiculain conspicuam patentem 5 mm. 



long. 



ferentes. Columella parva centralis conica adest. Ocula squamis ciucta 

 oirca 8, quorum 1-4 semina tiunt, altera inchoata manentia. Semiiia 

 2-3-angulatn, prone alata. Emhryo duobas cotylodonibus. In maturitateni 

 squama) feminas inter se separant, speciem involucris formantes, ex qua 

 semina efl'uf'iunt. RamuH juveniles foliis longioribus patcntioribusque. 



U. dn C.arenage ; riverside on serpentine rocks ; 800 ft. 379. -Tliis new 

 species sbould undoubtedly be placed in tbc Actinostrobinse, in near relation- 

 sliip witli CallUris. Within tliat genus its affinity is closest with C. Machuijana 

 from East Australia, tbe sole member of tlie section Octoclinis, which alsa 

 shows prevailing tetramery, Tliere can be little doubt (at least to those 

 wlio a 'Tree with the disintegration of the genus Callitris in the wi'ier sense 

 into the genera Tetradmis, Widdr'uuitoma, and Callitris sensu strictiore) that 

 this now plant differs sufficiently from t!ie rather homogeneous species of 



( 



to deserve 



separate 



o;(;neric rank. 



The habit of 



o-rowth of the tree is strikingly araucarioid, and so are the snuill, stiff, free, 

 imbricate leaves. The arrangement of the leaves in very regular alternating^ 

 whorls of four, thus producing eight conspicuous vertical rows of leaves on 

 tiie twig, is a striking and unique feature. The tetramerous arrangement of 

 the leaves is prolonged without break into the terminal male and female 

 cones. The female strobili are very distinct from those of Callitris spp. The 

 eight sciiles are arranged in two whorls, the members of the inner wliorl 

 nieethK*- in the centre, and those of the outer whorl covering the 



ternal 



gaps ; the 



scales themselves are erect and ^lender, the inner ones being 

 rhickcnod at the apex where they come into contact among themselves. Sub- 

 apically each scale bears a leaf -like spreading appendage. When the cone is 



mature the eight scales separate from one another, forming a kind of cu[ 

 like involucre from which the ripe seeds are scattered. The ovules are about 

 eio-lit in number, arranged around a small central columella ; the ripe seed 

 U scarcely winged and contains a dicotyleJonous embryo. 



