999 



NA in general. 



E :I,AE ViaATTJM A. Br. 



Sts not tuberculate, 1-5 hi, pale g, 

 14-30-furrowed; ridges almost smooth; 

 sheaths elongate, enlarged upward, 

 marked with a black girdle at base of 

 the com decid w-margined teeth, and 

 rarely also at base of sheath; ridges of 

 sheath with a central carina and some- 

 times with faint short, lateral ones. 

 NC; O; La; Cal; Ore. 

 **Sts slender, tufted, 5-10-grooved. 

 13: VABIEGATUM Schleich. 



Sts ascending, 6-18' long, com simple 

 from a branched base, 5-10-furrowed; 

 sheaths g, variegated with black above, 

 teeth 5-10, tipped with a decid bristle; 

 central air-cavity small. NH; 111; Alk; 

 Greenland. 

 E: SCZBFOIDES Michx. 



Sts filiform, very num. 3-6' hi, flexuous 

 and curving, mostly 6-furrowed, with 

 acute ridges; sheaths 3-toothed, bristle- 

 tips more persistent; central air-cavity 

 0. New England; Pa; 111; north. 



Order Z.YCOFODXACEAE Lindley. 

 PSIZiOTUM R. Br. 



Lvs minute, abortive; sporangia 3- 

 celled: 4 mostly tropical species. 

 P. TBIQUETBUM Swz. 



Sts erect 8-10' hi, triquetrous at base, 

 many-times forked at apex; ultimate 

 divisions triquetrous-winged; Ivs remote, 

 awl-shaped, less than 1" long; sporangia 

 in spikes. Pla; SC. Synonyms: P. Flor- 

 idanum Michx. P. dichotomum Link. 

 Bernhardia dichotoma Willd. B. pedun- 

 culata Desv. Lycopodium nudum L. 

 XiYCOPODXUM L. 



Lvs well developed, In 4-many ranks; 

 sporangia 1-celled. Near 100 species. 

 Section PX.AXANTHUS Beauv. Spor- 

 angia borne in axils of Ivs which are 

 similar to those of sterile and fertile sts. 

 Sporangia com in axils of upper Ivs; 

 Ivs dark g, shining, about 8-ranked. 

 X.: SEX. AGO L. 



Sts 3-6' hi, thick, rigid, erect, 2-3- 

 times forked, forming a level-topped 

 cluster; Ivs elongate-lanceolate, mu- 

 cronulate, entire or spinulose-denticulate, 

 nerved above, convex below. NC; Mich; 

 New England; Alk; Greenland. Syn- 

 onyms: L. recurvum Kit. L. suberectum 

 Lowe. Plananthus selago Beauv. 

 X.: X.VCXDVX.TTM Michx. 



Sts ascending, thick, 2-3-times forked, 

 branches 6-12' hi; Ivs widely spreading 

 or reflexed, flat, one-nerved, acute, 

 minutely toothed. NC, northward. Syn- 

 onyms: L. reflexum Swz. L. serratum 

 Desv. Plananthus reflexus Beauv. 

 * 'Sporangia only in axils of upper Ivs 

 which form spikes; Ivs many-ranked. 

 I,: INUNDATT7M L. 



Sterile sts creeping, flaccid, forking; 

 fertile sts erect, simple, 1-4' hi, bearing 

 a short, thick spike ;lvs lanceolate or 

 lance-awl-shaped, acute, entire, soft, 

 spreading or curved upward on prostrate 

 sts. New England; Mich; southward. 

 Synonyms: L. palustre Lam. Plananthus 

 inundatus Beauv. 

 Variety PXNKATUM Chapm. 



Sts pinnately branched; Ivs bristly- 

 fringed below middle, unequal, the 

 upper and lower shorter and somewhat 



1000 



appressed, the lateral widely spreading; 

 fertile sts 1 hi, very leafy; spike thick, 

 cylindric, 2-3' long. Western Pla. 

 Variety BIGBI.OVII Tuckerm. 



A form having fertile sts 5-7' hi, with 

 more pointed, often tooth-bearing Ivs. 

 Synonym: L. Carolinianum Bigel. 

 X.: ALOPECTJBOtDES L. 



Sts stout, densely Ify thruout; sterile 

 branches flaccid, procumbent, creeping; 

 fertile branches rigid, erect, 6-20' hi, 

 bearing a single spike; Ivs narrowly 

 linear - awl - shaped, spinulose - pointed, 

 spreading, conspicuously bristle-toothed 

 below the middle, nerved above, those 

 of the cylindric spike with long, seta- 

 ceous tips. NJ to Pla; Miss. Synonyms: 

 L. longipes H & G. Plananthus alope- 

 curoides Beauv. 



Section XSULYCOPODIUM (Lepidotis 

 Beauv.). Sporangia borne in the axils 

 of yellowish, scale-like. imbricated, 

 ovate or cordate Ivs which form a dis- 

 tinct spike; Ivs of sterile branches very 

 unlike those of the spikes. 

 *Sts Ify to base of spikes, or nearly so. 



I. Spikes nodding. 

 I.: CEBNUUM L. 



Sts erect, branching, branches similar; 

 Ivs crowded, awl-shaped, incurved, terete 

 in middle, spreading, grooved below; 

 bracts 8-ranked. Fla; Ala. Synonyms: 

 L. marianum Willd. L. curvatum 

 Blume. E. Borganum Richard. L bryi- 

 folium Vent. 



II. Spikes erect, closely sessile. 

 Zi! AKNOTIKUM L. 



Sts much branched, prostrate, creep- 

 ing. 1-4 long; ascending branches sim- 

 ilar, 5-8' hi, sparingly forked; Ivs equal, 

 spreading, 5-ranked, rigid, linear-lan- 

 ceolate, minutely serrulate, nerved be- 

 low; spike oblong, cylindric, thick. New 

 England; NJ; Wash; Alk; Greenland. 

 Synonyms: L. juniperifolium Lam. L. 

 bryophyllum Presl. Lepidotis annotina 

 Beauv. 

 Variety PT7NGEN8 Desv. 



A mt form with shorter and more 

 rigid, pointed Ivs. Synonym: L. reclin- 

 atum Michx. 

 X.: OBSCUBT7M L. 



Ground-pine. Sts erect, 6-9' hi, from a 

 subterranean creeping rtstock, densely 

 branched above, the crowded branches 

 spreading fan-like; Ivs 4-6-ranked, lan- 

 ceolate-linear, acute, entire; spikes 4-10 

 on each plant; bracts many-rowed. Can- 

 ada; NC; Ind; Mich. Synonym: Lepidotis 

 dendroidea Beauv. Lycopodium den- 

 droideum et var. obscurum. 

 X.: AX.PZHTJM L. 



Sts elongate, creeping, with ascend- 

 ind densely clustered branches; Ivs 4- 

 ranked, erect, imbricated, adnate-decur- 

 rent, of 2 forms; those of lateral rows 

 lanceolate, falcate, acute, carinate, con- 

 cave within; those of intermediate rows 

 scarcely 1-third smaller, lance-awl- 

 shaped, the upper and lower rows not 

 different. Lake Superior; Rocky Mts; 

 Wash; Alk. 



III. Spikes erect, short-peduncled. 

 X: 8ABINAEPOI.IUM Willd. 



Ground-fir, sts elongate, creeping, com 

 underground; branches erect, short, dich- 

 otomous, clustered; Ivs 4-rowed, small, 



