more dwarf, usually 2-flowered variant called E.ramosum 
var. lanceolatum Griseb. (which is scarcely separable from 
Schlechter’s 17. modestiflorum) can be readily traced. The 
EE. modestiflorum form grades into the variant named L. 
Boissierianum Sehlitr. (2. biflorum Cogn., nec Forst.f., 
nee Ruiz & Pav., nee Rodr.) and through it to 4. santa- 
clarense Ames and to the extreme form represented by 
E.imbricatum Lindl. (ef. diagram) ; this form being char- 
acterized by its stout stems, large leaves, dense head-like 
racemes of relatively large flowers and very conspicuous 
conduplicate bracts. 
ramosan2 
f Lexicaale 
mixtum 
L, Lat 
ici ais modestifloram 
Hoissierianam 
santaclarense 
uimbricatam 
Another line of transition leads through varying 
vegetative characters and variation in the callus of the 
lip to the form described as .mivtum Schltr. The type 
of H.mivtum is a tall very stout plant with large branches 
and two forms of leaves; that is, the leaves of the primary 
stem are much larger and longer than those of the sec- 
ondary stems. 
The extreme phase of any one of these named forms 
is very distinct, but the presence of gradients from one 
phase to another convinces us that the extremes should be 
[ 42 ] 
