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singly, or in clusters on the side of a branched phylloclade which 

 has some external resemblance to the ovuliferous scale of Cycas, 

 which latter, however, is foliar. The phylloclade, being partly 

 fertile, partly sterile, suggests a resemblance to a similar condition 

 in 08tnunda. Each flower of Phyllocladw is axillary to a bract 

 which ultimately becomes fleshy. The flower itself consists of 

 an erect nucellus surrounded by an ovular coat which ultimately 

 becomes hard and bony, and which is itself partially invested at 

 the base by a tubular fleshy aril. 



In the genus Microcachrys * the decussate leaves pass abruptly 

 into the bracts or seed-scales, but with a change from a decussate 

 to a spiral arrangement. The fruit-scales are ovoid and boat- 

 shaped, becoming ultimately succulent, and each one bears a single 

 inverted pendulous ovule from the incurved upper margin. The 

 seed is partially invested at the base by a tubular, fleshy aril. In 

 the position of the solitary ovule there is a resemblance to Saxe- 

 Oothea and to Agathis. 



Podocarpw is remarkable for the fleshy development of the 

 peduncle and of the bracts that spring from and which are 

 congenitally united with it. The flowers are solitary or in pairs 

 in the axil of one of the uppermost bracts. The ovule is inverted, 

 its funiculus being adherent to the fleshy bract. The structure, 

 according to Van Tieghem (Joe. cit. t. 15. figs. 79-86), shows 

 that whilst the bracts have the xylem and phloem arranged as in 



leaves, *, i n the raphe of the ovule the arrangement is reversed^ 



P • 



*» as is generally the case in the fruit-scales of Conifers. 











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In the Cupressinea? and the other tribes which follow, there is 

 never any fleshy aril, and only in one genus, Juniperus, do the seed- 

 scales become fleshy. Moreover, the fruit-scale, which externally 

 appears in many of the genera to be a single organ, in others 

 shows traces of a compound nature, a complexity indeed which 



• jt / x * 



18 re vealed in all the genera the microscopic anatomy of which 

 has been studied. The scales of the cone are arranged in decus- 

 sating whorls and in continuous sequence with the ordinary leaves. 

 Sometimes the transition is abrupt without intermediate forms ; 

 at other times there is a gradual passage from leaf to fruit-scale, 

 some of the phyllomes having more of the characteristics of leave--*, 

 other* of fruit-scales. 









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* J. D. Hooker, Flora Tasmania, tab. 100 a. 



UKK. JOUKN.— BOTANY, VOL. XXVII. 



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