Ml 



ORDEB CXI.III. I.Y. MOBS-FAMILY. 



2. W. ilvensis. Woolly Fern. 



Frond oblong-lanceolate In outline, amootblah and light-green above, 

 covered with a reddish wool beneath, as also tbe stipe ; pinna- oblong, almost 

 pinnate ; ultimate segments crenately and minutely toothed ; *ori attached near 

 the margin, at length almoat confluent A little fern, 4'-' high, dlstingnlaned 

 by th hairy under sortaee of tb. frond. Common on rock*. June. 



9. DKT6PTEBI8. 



Sori round. Indnsium somewhat flattened, roundish-reni- 

 furni, opening all round. 



1. D. Thelypteris. 



Frond lanceolate In outline, pinnate, tapering In width from base to apei ; 

 plnnas linear-lanceolate, deeply pinnatlfld ; ultimate segment* oblong, obtuse, 

 nearly entire, revolute on the margin ; sort crowded, at length confluent A 

 common fern in low grounds and swamp* Frond IV IS 1 high. July Aug. 



2. D. Novcboracdnsis. 



Frond oblong-lanceolate in outline, pinnate, tapering In width to the apex, 

 except near tbe base, where the lower pairs become shorter than those above 

 and are bent down; pinna; linear-lanceolate, deeply pinnatlfld; ultimate seg- 

 ment* oblong, obtuse, newly entire, not revolute at the margin. Sorl scattered, 

 marginal, not at any time confluent A common species In wet ground*, much 

 resembling the last, but of a paler green, and with the texture of the foliage 

 somewhat more delicate. Frond 10' 1S< high. July Aug. 



3. D. intermedia. Sliield Fern. 



Frond oblong-ovate In outline, blplnnate, of a rather dark, shining green ; 

 segment* narrow-oblong, obtuse j lower one* deeply pinnatlfld, with sharply 

 toothed lubes ; upper onea plnnatifldly cut, with more or less toothed lobe*; 

 serrate teeth 'of the ultimate segmenta tipped with soft, short bristle*. Sori 

 sparsely scattered. A very common specie* in woods, 18 n, high. July. 



4. D. cristdta. Crested SJiield-Fern. 



Frond narrow-oblong In outline, pinnate ; pinna; abort, ovate or oblong, 

 very broad at base, so as to appear somewhat triangular, acute, usually alter- 

 nate, deeply pinnatlfld ; lowest segmenta oblong, obtuse, nearly pinnatlfld, tbe 

 others finely serrate, or toothed ; Mri huge, In a single row, between the mid- 

 vein and the margin often confluent. A rather common specie* In swamps 

 and low grounds, distinguished by it* long, narrow, dark-green fronds, which 

 are 12 ft high, with a scaly stipe. July. 



5. D. marginale. Marginal Shield-Fern. 



Frond oblong-ovate In outline, M -pinnate; pinna; lanceolate, broad at base; 

 ultimate segments oblong, obtuse, more or lea* crenately toothed; upper one* 

 decnrrent; aori Urge, arranged entirely on the margin. A large, elegant fern, 

 common in moist, rocky wood*, W W high ; distinguished by It* entirely 



DUTgilul BOTL 



Sori round. Indusium orbicular, peltate, depressed, attached 

 to the centre, opening all round. 



1. P. acrostichoides. Chaffy Shield-Fern. 



Frond lanceolate In outline, on a chaffy stipe, pinnate ; pinna; nearly or quite 

 alternate, distinct lanceolate, and somewhat falcate, on abort stalk*, serrate, 

 rarely cot and lobed, teeth tipped with bristles; upper one smaller, and bear- 

 Ing tbe aori near tbe mid-rib, which at first merely contiguous, soon became con- 

 fluent, and cover the surface. A very common fern, with dark, evergreen 

 foliage, growing 1 t ft high, in wood*. July. 



11. ONOCLtA. 



Fronds fertile and sterile. Fertile frond bipinnate ; alternate 

 segments very strongly revolute, forming a sort of berry-shaped 

 involucre*, containing the sporangia. Sori at first separate, at 

 length confluent. Indusium thin, cucullate, attached bythc lower 



]<.. 



1. 0. sensibilis. Sensitive Fern. 



Sterile frond* In clump*, on long, amootb stipe*, broad-triangular In outline, 

 deeply ptoaatlOd, almoat pinnate; segmenta oblong- lanceolate, entire or undu- 

 late and toothed, varying to pinnatlfld ; upper segment* pasalng Into eeh 



other. A very common ana In low ground*, especially the sterile frond-, witu 

 a remarkable difference between the sterile and the amaller, fertile fronds ; 1<>' 

 -16> high. July. 



11 08M*Xli.\ 



Sporangia gtoboee, pedicellate, naked, opening with -. 

 entirely covering the surface of the much contracted fertile 

 fronds, or fertile pinme. 



1. 0. spectabilis. Flowering F,rn. 



Stipe smooth ; frond blplnnate, entirely smooth, bearing the fruit In a ter- 

 minal, contracted, racemose panicle; ultimate segment* oblong-lanceolate, dis- 

 tinct, serrate, rather oblique at base. An elegant fern, 28 ft high, distin- 

 guished by tbe terminal, reddish-brown, bipinnate panicle, formed of 

 traded segments of the frond. Common In swamps and low grounds. June. 



2. 0. cinnam6mca. Cinrtamon Fern. 



Sterile and fertile fronds separate, appearing at the same time, each clothed 

 with long, rusty wool ; sterile fronds at length smooth, pinnate ; pinna; lanceo- 

 late, pinnatlfld ; ultimate segment* broad, ovate-oblong, obtuse, entire ; fertile 

 frond* blplnnate, much contracted, nearly or quite covered with th. 

 sporangia. A very common fern growing In clumps In low grounds and 

 swamps. The fertile fronds soon decay, but the barren frond* continue to 

 grow, attaining the height of 8 It ft May June. 



3. 0. Claytoniana. Interrupted I 



Frond* *t first woolly, especially at base, soon smooth, pinnate ; pinna; ob 

 long-lanceolate, deeply pinnatlfld, except a few which are near the middle, and 

 when full grown are completely pinnate and fertile, covered with reddish-brown 

 sporangia; ultimate segments of the sterile pinna oblong, obtuse. A very 

 common fern In low grounds, 20 ft high, distinguished by It* middle, fertile 

 pinna; between sterile ones at base and summit MayJune. 



18, BOTRfcniUM. 



Frond consisting of 2 portions, a terminal, pinnatcly-parted, 

 contracted, racemose, fertile segment, and a lateral, sterile seg 

 ment Sporangia sessile, distinct, clustered, opening by 2 trans 

 verse valves. 



1. B. Virgfnicum. Hattlesnake Fern. 



Plant somewhat hairy; sterile frond situated above the middle, tcrnatcl.* 

 divided completely to the sessile base, triangular In outline ; primary division 

 pinnate; pinna; plnnately divided; ultimate segments oblong-lanceolate, pin 

 natlfldly cut and toothed ; fertile frond blplnnate, forming a contracted, race 

 mote, pedunculate panicle. A beautiful fern, common In rich, rocky woods 

 12 ft high. July. 



Lycopodiacese. Clvb-mos9- 



f ami I ;i. 



ORDER CXLUI. 



Sporangia compressed, mostly reniform, l-cdli-d, opening bv 

 J transverse valves, axillary, usually in a kind of spike co 

 ng of reduced leaves or braets, wild the sporangia in their 

 or sometimes contained in the axils of the proper leaves. 



* Sporangia in (he axil* of tfu proper leave*. 



1. L. lucidulum. Shining Club-moss. 



Stem* thick, simple or dichotomous, with a few ascending branches; leave* 

 dark green. In about 8 rows, more or less spreading or recurved, linear-lanceo- 

 late, acute ; stem 4'-S< high, thickly clothed with tbe rigid, dark green leave*. 

 which are larger than In the other species. Common In low rich wood*. Aug. 



* Sporangia <n dlttinct ipltet 



2. L. dendruideam. Tree Club-moss. 



Stem erect, ilmple below, with the linear-lanceolate, short and erect l> 

 ireaaed leaves In 4 rows, dividing above Into many, nearly or quite erect, cylin- 

 drical branches ; spikes 13, cylindrical, sessile, the branches being leafy U 

 the top. A handsome little tree-like evergreen, arising from a creeping rhlac 

 ma. Common In moist wood*. Stem ' 8' high. Aug. 



