190 Rhodora [OCTOBER 
Farlowii, but with the deep-purple corolla of the glabrous E. purpurea 
and the sparingly pubescent var. Randii. 
Euphrasia purpurea is our most variable species, in its more pro- 
nounced trends appearing like a number of species but without dis- 
tinct concomitant characters. The characteristic purple corolla of 
typical E. purpurea and var. Randii is ordinarily a good character, 
but white-flowered forms of each are now known, thus breaking down 
a line of demarkation which was formerly used in distinguishing the 
very densely pubescent white-flowered var. Farlowit. The diagnostic 
value of the color of the corolla is now further put in doubt by the 
discovery by Mr. Norton of the Matinicus plant which in every other 
character matches extreme white-flowered var. Farlowii but which 
has the purple corolla of true E. purpurea. These extremes, although 
pronounced in the majority of colonies are, then, better treated as 
variants of one highly diversified species. It is noteworthy that true 
E. purpurea has its great development about the Gulf of St. Lawrence, 
where var. Randii is rare, and that it does not reach the Maine coast, 
where the latter is common; also that var. Farlowii is most abundant 
in Newfoundland, the Magdalen Islands and the Maritime Provinces 
but rare on the Maine coast. 
4. E. morus (Ledeb.) Wettstein, Monog. d. Gatt. Euphrasia, 141, 
t. 4, fig. 205-210 and t. 12, fig. 5 (1896); Robinson, Ruopora, iii. 
271 (1901). — E. officinalis, var. mollis Ledeb. Fl. Ross. iii. 263 (1849).— 
Plant 4-10 em. high, simple or occasionally with a pair of short spread- 
ing branches: leaves large for the size of the plant, 8-15 mm. long, 
ovate, coarsely crenate-dentate, copiously pubescent: inflorescence 
when young almost capitate, in maturity with the 1-3 lower pairs of 
bracts remote: bracts resembling the leaves: calyx densely pilose; 
its teeth barely acute: corolla scarcely overtopping the bracts, 5-6 mm. 
long, resembling that of E. disjuncta but deeper purple.— Grassy and 
sandy banks, Alaska, Islands of Bering Sea, and Kamtschatka. 
ALASKA: hillside, Akutan Island, August 21, 1907, E. C. Van Dyke, 
no. 95; other stations cited by Wettstein. 
Very closely related, to E. disjuncta and E. arctica, from both of 
which it differs in the more congested inflorescence, more copious 
pubescence, more rounded bracteal teeth, and more purple corolla. 
From EL. arctica it also differs in its smaller corolla. 
5. E. disjuncta, n. sp. E. officinalis, 8 Hook. Fl. Bor.-Am. ii. 
106 (1838). E. latifolia Robinson, Rnopona, iii. 274 (1901), in part, 
perhaps also of Pursh in part. Æ. hirtella Robinson, l. c. 275 (1901), 
in part, not Jordan. E. arctica Robinson & Fernald in Gray, Man. ed. 
