73. OPHIOGLOSSUM, EUOPHIOGLOSSUM. 445 



Euophioglossum. Fertile spike single, arising from the base of the barren 

 segment. Sp. 1-6. 



1. O. lusitanicum, L. ; rootstock slightly tuberous; fr. 1-3 in. 1., the sterile 

 division placed below the centre, \-\ in. 1., 1^-2 lin. br., linear-lanceolate, the point 

 bluntish, the base narrowed ; texture thick, no midrib, and the veins indistinct ; 

 fertile spike J- in. 1., the peduncle firm, \-\\ in. 1. when mature. Rk. B. F. 

 t. 47. 0. azoricum, Presl. 



Hab. Shores of the Mediterranean, and as far north as Guernsey, Azores, Madeira, 

 Guinea Coast. The European plant is developed in winter, whilst in Britain 0. vul- 

 gatum is not mature till June. 0. gramineum, Willd., from North and Peninsular India, 

 is probably identical, and the same may be said of the Australian and New Zealand 

 0. gramineum, R. Br. The New Zealand 0. minimum, Colenso, is not more than 1 in. 

 high, with the barren segment 3 lin. 1. by half as broad ; and three closely-allied forms 

 have been gathered by Dr. Welwitsch in Angola, 0. gomesianum, Welw., 1-1^ in. L, 

 barren segm. near the base, ^-f in 1., 2 lin. br. ; 0. luso-africanum, Welw., 4 in. ]., barren 

 segm. central, 1 in. 1., 2 lin. br. ; and 0. gracillimum, Welw., 1 in. L, barren segm. 

 central, truly linear, acute, 1 in. or less 1., under 1 lin. br. The African forms have 

 lately been monographed by Dr. A. Braun in Kuhn's Filices Africanae. 



2. 0. rubellum, Welw. MSS. ; rootstock slightly tuberous ; fr. 1-2 in. 1., the 

 sterile division placed very near the base, roundish, in. each way, without a 

 haft, often adpressed to the surface of the ground, thick in texture, the veining 

 hidden ; fertile spike -f in. 1., the reddish peduncle f-1 in. 1. when fully 

 matured. 



Hab. Pungo Andongo, Angola, 2,400-3,800 ft. ; Welwitsch 33. Most like 0. bulbosum 

 but smaller, with the barren segment sub-basal. 



3. O. bulbosum, Michx. ; rootstock tuberous, -f in. thick ; fr. 2-4 in. 1., the 

 sterile division placed considerably below the middle, ^-1 in. 1., f in. br., ovate, 

 without a haft ; texture stouter than in O. vulgatum, the midrib and veining 

 quite indistinct ; fertile spike \-\ in. L, the peduncle 1^-2 in. when fully 

 developed.. 0. crotalophoroides, Walt. 0. tuberosum, Hk. fy A. 0. opacum, 

 R. Br. Hk. & Gr. t. 50. O. stipatum, Colla. 



Hab. Louisiana and Florida to Chili and Tristan d'Acunha ; and a Malay specimen 

 from Prof. De Vriese agrees with the American plant. 



4. O. nudicaule, L. fil. ; rootstock slightly tuberous ; fr. 2-4 in. L, the sterile 

 division placed not far from the base, %-\\ in. L, J-^ in. br., ovate or oblong, 

 without a haft or with only a slight one, the texture thin but the veins not 

 distinct ; fertile spike % in. 1., the peduncle often 2-3 in. 1., very slender. 

 Swartz, Synop. t. 4. /. 2. Kse. t. 29. fig. 29. t. 3. b. O. parvifolium, Hk. & Gr. 

 Beddome, t. 71. 



Hab. America from the Southern United States southward to Brazil ; New Caledonia, 

 Malaccas, Peninsular India, Guinea Coast, Angola. Whether this be the original nudi- 

 caule is not quite clear, but it is the plant figured under that name by Swartz and Kunze. 

 To the type belong 0. ypanemense, Mart. t. 73, 0. surinamense, Keich., and O.flavicaule, 

 Klotzsch, and probably 0. moluccanum, Schlecht. Kunze's fig. a, 0. Wiffhtii, Hk. & Gr., 

 and 0. ellipticum, Hk. & Gr. t. 40, are larger in size, with the sterile segment as thin 

 and the venation as plain as in reticulatum, 2 in. or more 1., |-f in. br., and the stem 

 longer. 0. macrorhizum, Kze. t. 29. fig. 1 (from Guiana and Brazil), is a much-reduced 

 variety, not more than l-2 in. high, with the sterile division not more than 4 in. 1., 

 \ in. br. The Sandwich Island 0. continuum, Brack, t. 44, is most like this, but the 

 barren segment is farther from the base of the stem ; and this also appears to be the 

 case with the Chilian 0. melipillense, Remy. 



6. O. vulgatum, L. ; rootstock not tuberous ; fr. 6-9 in. 1., the sterile division 

 generally placed about the middle, 2-4 in. L, |-2 in. br., ovate or ovate-oblong 



