1924] Fernald,—Polystichum mohrioides 93 
got a severe sprain."! At the isolated stations at the head of Snow 
Brook and on the ragged walls of Devil's Gulch on Mt. Albert, 
Quebec, where I have several times collected the plant, var. scopuli- 
num is in dry rock-crevices (serpentine) or under broken rock whence 
its tough roots are most difficult of extraction. In the latter situations, 
where the tallest and least plicate fronds naturally develop, the fronds 
are often badly broken by the shifting rock-debris. 
The range of the aggregate-species, Polystichum mohrioides, is, as 
already stated, similar to the ranges of several other plants, although 
differing, naturally, in many details. Thus Myriophyllum elatinoides 
Gaudichaud occurs on New Zealand, Chatham Island, Tasmania, 
the Falkland Islands, in the Ar dean region from Cape Horn to Ecua- 
dor, locally in Mexico, and it is known in the western United States 
in Arizona and Oregon? Empetrum rubrum Vahl, characterized by 
white-woolly branchlets, leaves not reflexed in age and red drupes, 
occurs on the Falklands, along the Andes from Tierra del Fuego into 
Chile, on Masafuera (the western island of the Juan Fernandez group), 
and 2500 miles (4025 km.) east of Patagonia on Gough Island and on 
the islands of the Tristan da Cunha group. Outside the Subantarctic 
and southern Andean regions the only Empetrums are the Arctic 
cireumpolar E. nigrum L. with branchlets at most minutely puberu- 
lent, the leaves reflexed in age and the berries black or purplish; 
and two species centering on the Gulf of St. Lawrence, E. Eamesii 
Fernald & Wiegand and E. atropurpureum Fernald & Wiegand, 
both of which have the white-woolly branchlets, non-reflexed leaves 
and red berries as in the Subantarctic E. rubrum but differ from it 
in more trailing habit and in seed-characters.? 
The quaint little genus Lilacopsis of the Umbelliferae has three 
strongly marked species or groups of species. One, L. lineata (Michx.) 
Greene, with the linear-clavate broadly round-tipped 3-6-jointed 
leaves scattered and solitary along the creeping filiform stem and 
! Bradley in Hayden, U. S. Geol. Surv. of Terr. 6 Ann. Rep. 219 (1873). 
2 See Fernald, RHopona, xxi. 124 (1919). 
3 For further discussion, see Fernald & Wiegand, Ruopora, xv. 213-217 (1913). 
4 It is probable that, when the original plant of Hydrocotyle chinensis L. Sp. Pl. i. 
234 (1753) is critically examined, it will prove to be Lilaeopsis lineata, in which case 
we shall have to take up for the characteristic plant of Atlantic North America 
the highly inappropriate name L. chinensis (L.) Kuntze. 'The Linnean descriptiou 
strongly suggests L. lineata, although the phrase “Folia . . . saepius bina ad 
arliculos" is not very satisfactory. No Lilaeopsis is known from Asia and Linnaeus 
evidently had his geographic data confused. His Hydrocotyle chinensis has generally 
been referred to the all-inclusive L. lineata (or Crantzia lineata), but it is worthy of 
note that upon examining the Linnean type Asa Gray made the memorandum 
“a species of Crantzia," not our species, with which he was familiar. . 
