926 
CRYPTOGAMIA. 
Class XXIV. 
2319. Chordaria. Root scutate. Frond filiform of an olive color and cartilaginous substance. Fructifica- 
tion ; clavate, pyriform, concentric filaments constituting the whole frond. 
2320. Scytosipkon. Root scutate. Frond fiiform, tubular, subcoriaceous. Fructification ; naked pyriform 
granules covering the whole frond. 
2321. Sporochnus. Root mostly scutate. Frond plane, with distichous branches, bearing, in most instances, 
delicate pencil-like deciduous tufts of confervoid filaments, (" Receptacles composed of concentric, clavate, 
articulated corjjuscules.") 
2322. Huliseris. Frond flat, linear, ribbed, membriinous. Ccipsules heaped in sori. 
2323. Encceliuvi. Frond tubular or bladdery, dotted. Fruit, the tips of the frond filled with a black spora- 
ceous matter. 
2324. Zonaria. Root downy. Frond plane, ribless, flabelliform or wedge-shaped, or linear and dichotomous. 
Fructification, adnate tubercles collected into parallel lines on the frond. 
DIATOME.E. 
2259. ACHNAN'THES. Agh. Achnanthes. Sp. 1—2. 
15021 longipes Ag. long-stalked fine down ,| July Gsh 
2260. Dl A'TOMA. Ag. Diatoma. Sp. 5—16. 
15022 flocculosum .4^-. floccose fine film i| sum. Y.Br 
15023 marinum ^g-. marine little tufts febr. Y.G 
15024 Biddulphianum.,4^'. Miss Bidduiph's short down ,§ nov.d. G 
15025 striatulum As. striated short down d april G 
15026 obliquatum 4g-. oblique minute branc. | sum. Lt.Br 
2261. FRAGILLA'RIA. Ag. Fragillaria. Sp. 2—3. 
15027 pectinalis silvery loose tufts | march Y.G 
15028 hyemalis winter dense fl. tufts 3 april O.Br 
2262. MELOSEI'RA. Ag. Meloseira. Sp. 3—5. 
15029 nummuloides Ag. necklace down-like i| march Ysh 
15030 lineata Ag. striated short down i| march Ysh 
15031 discigera Ag. cup-bearing short down sum. Brsh 
2263. DESMI'DIUM. Ag. Des.midiu.m. Sp. 1—2. 
15032 Swartzii Ag. pinnatifid loose masses 1| sum. G 
2264. SCHIZONE'MA. Ag. Schizonema. Sp. 5—9. 
15033 Smithii Ag. Smith's slipp. threads f sum. Brsh 
15034 lacustre Ag. lake shpp. threads f sum. Brsh 
15035 Dillwynii Dillwyn's entangl. tufts 1| sp. su. Ol.G 
15036 apiculatum Ag. pointed lax tufts f spring Y. G 
15037 dichotomum Grt-y. dichotomous erect tufts 1 sum. Y.G 
dit., sea coast E.b.t.2488. Confstip'data 
ditches 
ocean 
sea coast 
ocean 
ocean 
on wat. plan, 
rivulets 
salt marshes 
rivulets 
Ivs. of aquat. 
E. bot. t. 1761. Conferva 
E.b. t.l883.Co?//.te«^>/. 
E. bot. 1. 1762. Conferva 
E. bot. 1. 1928. Conferva 
E. bot. 1. 1869. Conferva 
E. bot. 1. 1611. Conferva 
Lyngb. phyt. dan. t. 63 
Eng. bot. t. 2287 
Dil.con.24. t. B. Conferva 
T)\.co.25.t.B.C.nunimul. 
still waters E.b.t.2454. Con.dissiliens 
sea coast 
lakes 
sea coast 
sea in basins 
sea in basins 
E. b. t.2101. Conf.fcctida 
Di.co. t.l04. Conffoetida 
Grev. crypt, t. 30 
NOSTOCHIN^. 
2265. PALMEL'LA. Ag. Palmella. Sp. 6—12. 
15038 protuberans Ag. lobed mass | sp aut. G rocks Eng. bot. t. 2583. Ulva 
15039 botryoides bunched thin skin ... aut. G damp places 
15040 adnata Ag. adnate gregarious | aut. Y.Br mount, rocks Lyngb. phyt. dan. t. 69 
History, Use, Propagation, Culture, 
2229. Achnanthes. From the froth of the ocean, and sti/^-o?, a flower. Marine productions, separating 
into fragments, but by degrees. In the middle of each articulation are one or two crystalline points. 
2230. Diatoma. From ^lotrou/-/;, incision, in allusion to the curious manner in which the filaments are divided 
into joints cohering alternately by their angles. 
2231. Fragillaria. So named on account of their fragile nature, which is more remarkable than that of 
other Conferv£e. The filaments when complete are flat and composed of little fragments glued together 
crosswise. These are very narrow, and when once separated do not cohere again. 
2232. Meloseira. From ^ae?, a membrane, and ffu^a., a chain, with reference to the form of the filaments. 
This genus differs from the last, as Conferva from Oscillatoria. 
2263. Desmidium. From SefT^taj, a bond, in allusion to the singular manner in which the parts cohere when 
in a state of dissolution. At that period the articulations become half separated one from the other in such a 
way as to represent a pinnatifid appearance. 
2264. Schizonema. From a-xii^^, to divide, and v-^^a, a filament ; the filaments are finally divided into com- 
pound granules. These plants have entirely the habit and flexible substance of Confervas. When fresh they 
are sparkling and brown, when dry olive-green, and very shining. They are composed of many filiform 
individuals, w hich include nearly the same corpuscles as are visibV ; in the foreign genera Frustulia and 
Meridion. 
