Ord. VII. Tribe III. ALGM CONFERVOIDE^. 933 
15096 Filam. branched very minute, Branches and branchlets acuminate. Joints pellucid, Artie, cylindrical 
** Growing on animals. 
15097 Filaments simple hyaline clavate at end 
15098 Frond dichotomous, Axinj3e rounded : upper spreading 
15099 Frond virgate with all the branches divaricating 
15100 Frond somewhat moniliform virgate filiform, Branches scattered obtuse spreading 
15101 Frond much branched, Branchlets tapering at each end divaricating 
15102 Frond yellowish-brown, Branches divaricating 
15103 Frond dichotomous cylindrical equal. Branches thickened at end 
(3 Frond setaceous minute 
15104 Frond moniliform much-branched. Branches rather acute, Cauline whorls nearly distinct globose 
oc Filaments thick. Whorls of stem confluent : those of the branches distinct 
/3 Thinner bluish with distant whorls 
15106 Branches simple clustered. First filament nearly homogeneoui 
15106 Pencils of branches lanceolate acute erect 
15107 Pencils of branches ovate blunt spreading 
15108 Filaments hyaline very fine tufted entangled in nearly parallel lines 
15109 Filaments rigid straight entangled in a gelatinous black layer which has short rays 
13 Filaments twisted in bundles 
15110 Filaments rigid straight entangled in a gelatinous black layer with long rays 
15111 Filaments stiffish curved entangled in a compact somewhat coriaceous layer 
15112 Filaments transparent rigid straight entangled in a compact brownish-violet layer with short rays 
15113 Filaments very minute densely entangled : transverse stri^ wholly invisible 
15114 Filaments stiffish straight entangled in a gelatinous green layer with short rays 
15115 Filaments rigid rapidly oscillating straight entangled in a gelatinous layer with long rays 
15116 Filaments covered with a deciduous crust entangled in a blue layer 
15117 Filaments very slender flexuose densely interwoven into thin masses 
15118 Filaments very slender simple greenish lying in a thick very tender fragile ochraceous stratum 
15119 Filaments very fine rigid snow-white packed in a dull-yellow tuft 
15120 Filaments glaucous erect minute subulate fascicled at base separate at end 
15121 Filaments curved- wavy erect minute entangled in a dense layer 
15122 Filaments stiffish erect acuminate simple at the beginning finally branched 
15123 Filaments curved variously united entangled in a lax globule 
15124 Filaments mucous stiffish erect branched tufted 
15125 Filaments stiffish erect branched packed in a dark-green tuft 
15126 Filaments stiffish curved wavy thickish with lax rings 
15127 Filaments tufted fastigiate equal. Bands approximating in pairs many-dotted 
15128 Filaments dark-purple straight. Bands 5-dotted 
and Miscellaneous Particulars. 
causes, as from the elasticity of the filaments, from the motion of minute animalcula. Agardh, however, 
declares that O. curviceps has naturally the motion of an animal, but of a creeping not oscillatory nature. 
2286; Calothrix. From xoiXo;, beautiful, and hair, in allusion to the beauty of the entangled filaments ; 
the latter appear as if branched, by the singular juxta-position of small filaments. 
2287. Lyngbya. H. C. Lyngbye, a Danish botanist, is the author of an excellent work on Algfe, which he 
calls HydrophytologiEB Danicae Tentamen, published at Copenhagen, in 1819, in one volume quarto. This genus 
differs from Oscillatoria in the absence of a mucous matrix, and from Calothrix in being curved and quite 
distinct. In habit it approaches Conferva. 
2288. Bangia. So called in honor of Christian Frederick Bang, the author of a dissertation upon the plants 
of sacred history, published in 1767. 
3 O 3 
