288 MR. SPENCER LE M. MOORE—PHANEROGAMIC BOTANY 
Of the species common to the two Brazilian provinces we have :— 
From Goyaz and Bras. Or. (or with nearest affinity to such species) ...... 38 per cent. 
From Amazonia, Goyaz, and Bras. Or. » ua cu uc 290 5. 4 
From Amazonia and Bras. Or. M M WS uw ANE 13 o0 
From Goyaz, Bolivia, Peru, Colombia, and Bras. Or. pe oi Se R IRA es 
From Goyaz, Guiana, and Bras. Or. à ON M aN T ais 
From Bolivia and Bras. Or. ds nis cea ee A uw 
From Guiana and Bras. Or. dá PW Om M A 2 
From Goyaz, Amer. Cent., Bras. Or. C ee i 5 
From Goyaz, Paraguay, Bras. Or. 2: i c x n o. i o5 p 
Of the North-Brazil-Guiana species there occur :— 
ih Amazoma ahid DONE oot Al 76 per cent. 
EUER eir EEUU vlt A Tae oa Hu» 
A Ca Ie E OL dio aide re eR cH b. ni 
DESEE. d luc Uic PA EU osku Cosi eel eati B uw 
It must not be forgotten that the inclusion in the Santa Cruz flora of plants found 
growing on the banks of the Rio dos Bugres and Brasinho tends somewhat to enlarge 
the North-Brazil-Guiana factor in that flora. In spite of this, one may consider the 
flora as containing a comparatively large North-Brazil-Guiana element and a smaller 
South Brazilian. At Santa Cruz, therefore, we have a mixed flora in which North- 
Brazilian plants somewhat predominate, and the assertion that Santa Cruz ought to be 
included within the bounds of the North-Brazil-Guiana province will, it is trusted, be 
deemed in no way unreasonable. 
The statement just made may be supported by some additional data. One of the 
most singular facts in the whole range of phytogeography is the South-American distri- 
bution of Cycads, an order which, although in the northern hemisphere reaching to 
Florida and the Bahamas, is nowhere represented in the eastern part of South America. 
This is the more remarkable because in the Old World we find Cycads as far north as the 
thirty-third parallel, while in Australia and at the Cape they almost or quite attain to 
the thirty-fifth degree of south latitude. Moreover, most of eastern South America is of 
high geological antiquity, so that « priori one would certainly expect to find Cycads 
there. But whatever be the reason of their absence, the occurrence of a Zamia (Z. Brong- 
 miartii, Wedd.) at Santa Cruz close to the fifty-seventh parallel of longitude is worthy of 
notice. This species has been found in Eastern Bolivia at St. Xavier (lat. 16^ 10), a place 
about a degree further south than Santa Cruz, and this, so far as is known, is the southern 
limit of the order in America. The nearest neighbour of this Zamia is Z. Poeppigiana, 
Mart. € Endl., found by Poeppig on the banks of the Tocache river in Eastern Peru, just 
within the bounds of the Subandine province ; but, as Eichler * observes, it will probably 
be discovered within the Amazonian region, a region within which no Cycad has yet been 
met with. But although Cycads are not known from the North-Brazil-Guiana province,. 
as defined by Engler, the occurrence of Zamia Poeppigiana near the boundary of that. 
* Mart, Fl. Bras. iv. pars i. p. 416. 
