EP1PACTIS LATIFOLTA IX BRITAIN 37 



broad and narrow types here and there, mixed with other forms. In 

 B. E. C. Hep. iv. 503 (1910) the narrow-leaved form is reported as 

 present in great quantity, with no other types present. We have not 

 seen anything of the sort in localities known to us. 



We may now study in more detail the specimens of lip-bosses 

 figured in pi. 555. First, taking the whole aggregate of species, it 

 will be noted that E. viridiflora presents the smoothest type of lip, 

 otherwise there are considerable differences between the three types 

 shown. Var. dunensis in tig. 1 has a broad type of lip, with three 

 rather large, confluent bosses, whilst var. vectensis (tig. 2) has a long- 

 pointed lip and no centre-boss, and var. leptochila (fig. 3) with the 

 same long-pointed form has a very different moulding, and a pair 

 of ears, a feature paralleled in the case of E. latifolia in fig. 1(5. 

 E. purpurata, tigs. 4 and 7, shows a somewhat heart-shaped lip, with 

 more rugose side-bosses, and a small central boss ; the colour-scheme 

 of this species is quite distinct (see op. cit. 1920, p. 209). 



E. atropurpurea (fig. 8) has by far the most rugose side-bosses ; 

 we have never seen a specimen in which this was not so. In the lip 

 figured, there is a strongly rugose centre-boss; in some cases, how- 

 ever, this may be absent. The shape of the lip, in the example 

 figured, is almost semicircular, and this is from a fairly representative 

 plant. Fig. 5 shows a lip with highly rugose side-bosses, prominent 

 centre-boss, and a pointed lip with sides incurved : this is from a 

 Grassington plant which we take to be a hybrid of E. atropurpurea, 

 and E. latifolia. It is certainly not pure atropurpurea, and in that 

 case, its intermediate character is very evident from the drawing ; 

 we have never seen another example of a thoroughly incurved lip. 



Figs. 8-23 and 25 give examples of E. latifolia (media?) : of 

 these we may assign figs. 8, 9, 10, 13, 14, 17, 18, and 25 to the 

 "broad " type, figs. 11, 12, and 16 to the "narrow" type, and figs. 15, 

 19, 20, 21, 22, and 23, to the " intermediate " type, which has already 

 been referred to. Of these the corresponding leaf-schemes were 

 in part already indicated in our former paper. 



In the "Droad" set, figs. 9 and 25 have broad leaves, fig. 14 

 narrow ones, and figs. 10, 13, and 18 leaves of intermediate type. 

 The leaves of fig. 17 were not noted. 



In the " narrow " set, figs. 11 and 12 had leaves of intermediate 

 type, and fig. 16 very broad leaves. In the " intermediate " set, 

 figs. 19 and 20 had broad leaves, whilst of the intermediates fig. 15 

 had narrow leaves, and fig. 23 leaves of broad t} r pe. Thus we have 

 every sort of mixture of the three types of leaf and lip. 



The varieties of the lip-bosses and moulding are very complicated. 

 In figs. 10 and 13 there is a large, shallow centre-boss, in 8 and 21 a 

 small, rugose centre-boss, in 12 and 16 the three bosses are confluent, 

 16 being strongly rugose. In figs. 9, 17, and 22 there is a minute 

 but strongly-marked centre-boss. In figs. 18, 19, and 20 there is 

 a central ridge rather than a boss. In several other cases there 

 is something of the sort. In figs. 15 and 23 there is rather a central 

 trough than a ridge (cf. also fig. 2). 



The general moulding of the lip has also to be considered. Thus 

 in figs. 17 and 22 there is not only the distinct, minute centre-boss, 



