346 BOTANICAL GAZETTE (ma 



apically into sporophylls and basally into vegetative leaves {fig. 4). 

 The microsporangiate cones may be either sessile or pedicellate. In 

 either case there is a series of spirally arranged bracts closely investing 

 the base of the cone, the lower part of the pedicel, when present, being 

 naked (Jigs. 2, j) . In an otherwise abnormal cone I found the arrange- 

 ment of bracts similar to that on the megasporangiate pedicel. 



The gross features of Microcachrys are indicated in a figure of a 

 previous article. 1 The cones are always terminal in this form and 

 their sporophylls verticillate, in series of fours, the "series alternating 

 with one another and presenting from the exterior an appearance 

 of a spiral arrangement (Jigs. 5, 6). The small concrescent foliage 

 leaves are opposite, in alternating pairs. 



The form and structure of the microsporophyll of Saxegothaea 

 are indicated in Jigs. 7-9. Two are shown cut longitudinally 

 (Jig. 7), and between these is one cut through the sporangium, 

 showing the stomium and the wall with its columnar, comparatively 

 thick-walled, epidermal cells. The inner layers of the wall have 

 collapsed, but there are indications of three or four of these. 2 

 In the axial sections the vascular bundle with its accompanyin 

 resin duct is seen, and the connection of these with those of the ax 

 of the cone. The resin canal is expanded distally. This is apparent 

 in the tangential section of the cone as well (fig. 9) > where the CcnW 

 sporangia often show little trace of a canal, while in the lateral om - 1 

 is large. In fig. 8 resin canals and vascular bundles are seen in 

 transverse sections of the cone, at various distances from the axia 

 supply. In some of the sporangia, to the right of the figure, it- 

 position of the stomia is indicated. The microspores contain 

 three cells at the stage from which these figures were ma * 

 Megasporangiate cones of the same date have not ^^"^j 

 themegaspore (figs. 10, 1 1), with the exception of some a nor 

 ovules, to be described later. A single bundle accompanie 7^ 

 resin canal passes into each sporophyll, and this gives ^ 

 ovular supply just as the point of insertion of the integument is rea 



• Thomson, R. B., On the pollen of Microcachrys. Bot. Gazette 

 pis. r, 2. 1909. See pi. 1. ^ C on$pi<» a 



2 Cf. Norem, C. O., Zur Kenntnis der Entwicklung von Saxegot ae 

 Lindl. Svensk. Bot. Tidskr. 2:101-122. pis. 7-9. 1908. 



a 



