Ord.VII. Tribe III. ALG^ CONFERVOIDE^. 
941 
15251 Filam. twice or thrice dichotom. Artie, as long as broad, Tubercles ovate racemose on branched peduncles 
15252 Filam. much branched fine striated. Branches alternate somew. pinnated. Articulations as long as broad 
15253 Filaments branched rooting straight rigid. Branches scattered simple erect obtuse tapering at the base, 
Artie, about twice as broad as long 
15254 Primary filaments branched not jointed surrounded by pectinated spreading branchlets 
152.55 Filaments bipinnate very fine, Pinnce and pinnules opposite, Artie, very short, Theca ovate stalked 
15256 Stem covered with confervoid filam. Branches somew. bipinnate, PinnEe pectinate, Altern. pinnules subul. 
15257 Setae simple densely imbricated 
15258 Set£e incurved forked or crested imbricated 
15259 Filaments setaceous dichotomous fastigiate, Theca? globose sessile solitary 
/3 Filaments finer, Thecis lanceolate and ovate 
15260 Filaments flexuose, Thecffi sessile lateral globose 
15261 Filaments descending rooting, Theca solitary terminal globose 
15262 Filaments dichotomous, Thecas obovate stalked opposite on a common cornute pedic 
15263 Filaments branched caespitose, Thecae racemose 
15264 Filaments branched creeping. Branches erect nearly simple, Thecse heaped towards the tips 
15265 Frond dichotomous fastigiate cylindrical 
15266 Frond globose hollow 
15267 Filam. branched naked below, pinnated in the middle, Branchlets opp. nearly simple approximating 
15268 Frond tubular inflated simple 
15269 Frond lanceolate ensiform much tapered at each end wavy crisp 
15270 Frond tubular lined clathrate branched filiform compressed. Branches simple tapering at base 
15271 Frond tubular irregularly clathrate filiform. Branches tapered 
15272 Fronds obovate or lanceolate flat wavy laciniate-crisp 
15273 Frond obovate slippery sinuous blistered finally expanded 
15274 Fronds blistered plaited-crisp rugose heaped in an expanded layer 
15275 Frond flat with numerous dilated segments 
15276 Frond flat ovate lanceolate flat wavy crisp at the edge 
FLORID E^, 
15277 The only species 
15278 Jugament filiform compressed. Pinnules opposite pectinate-cut 
and Miscellaneous Particulars. 
QSffl. Solenia. So called, from <r«DX^v, a tube, in allusion to the tubular nature of the frond. 
2308. Ulva. This was the common name applied by the Latins to all kinds of marine plants. The word is 
said to have been derived from the Celtic w/, water. The green laver which, stewed with lemon juice, is so 
much esteemed in England, is the U. lactuca. 
2309. Porphyra. This genus has received its name from jra^ipy^e?, purple, on account of its being remarkable 
among UlvaceaE for possessing that color. 
2310. Polyides. From ^oXvulr,?, multifarious, in allusion to the diversity of appearance of the smgle species. 
2311. Ptilota. Named in allusion to the form of the frond : from imKaTOs, pennated. 
