1001 



appressed, lanceolate, mucronate, entire, 

 apparently terete; spikes cylindric, soli- 

 tary, with cordate, acuminate bracts. 

 NY; NJ; north and west. Synonyms: 

 Li. alpinum Michx. L. armatum Desv. 

 "'Fertile branches with minute Ivs, so 

 that the spikes appear long-peduncled. 



I. Lvs uniform, many-ranked; sts 

 terete. 

 1: CX.AVATUM L. 



Running-pine. Sts extensively creep- 

 ing; branches similar, ascending, short 

 and Ify, the fertile terminated by a 

 slender peduncle bearing 1-4 linear, 

 cylindric spikes; Ivs much-crowded, 

 linear-awl-shaped, tipped like bracts 

 with a fine bristle. Canada; NC; Wash; 

 Alk. Synonyms: L. officinale Neck. L. 

 vulgare Vaill. L. inflexum Swz. L. 

 serpens Presl. Lepidotis inflexa Beauv. 



II. Lvs of 2 forms, few-ranked; sts 

 flattened. 

 X.: CABOXJtNXANUM L. 



Sterile sts and their few short 

 branches entirely creeping; lateral Ivs 

 broadly lanceolate, acute, and somewhat 

 oblique, 1-nerved, widely spreading in 2- 

 ranks; upper row of Ivs shorter, ap- 

 pressed; peduncle simple, slender, 2-4' 

 hi, clothed with small bract-like Ivs, 

 bearing a single cylindric spike. NJ; 

 Fla; Ala; La. Synonyms: L. repens 

 Swz. L. affine Bory. Lepidotis repens 

 Beauv. 

 X.:COMFXtANATUX L. 



Sts extensively creeping, with erect 

 or ascending fan-like branches several 

 times forked above; branchlets crowded, 

 flattened; Ivs minute, imbricate-appres- 

 sed, 4-ranked; lateral rows with some- 

 what spreading tips; intermediate 

 smaller, narrower, wholly appressed; 

 peduncle slender, bearing 2-4 cylindric 

 spikes. New England; NC; Mich; north- 

 ward. Synonyms: L. thyroides Humb & 

 Bonpl. L. tristachyon Pursh. L. an- 

 ceps Walls. L. chamaecyparissus A. Br. 

 Lepidotis complanata Beauv. Some 

 botanists unite Lycopodium alpinum L. 

 and L. sabinaefolium with this species. 



Descriptions of the following species 

 have not been seen by the writer. 

 I.: ADPBESSUM (Chapm) Lloyd and 

 Underwood. 



L: CHAMAECYFABISSUS A. Br. 

 I.: PINNATTTM (Chapm) Lloyd and Un- 

 derwood. 



Based on L. inundatum pinnatum? 

 X.: POBOFKXX.UM Lloyd and Under- 

 wood. 

 !: SITCHENSE Hups. 



ISOETACEAE. 

 Genns ISOETES L.lnnaeu. 



Quillwort. About 50 species. 

 Section I. Submerged, rarely above 

 water in driest seasons; Ivs quadrangu- 

 lar, without peripheral bast-bundles; 

 velum incomplete. 

 *Stimata absent. 

 1: XiACTTSTRXS L. 



Lvs 10-25, stout, rather rigid, obtusely 

 quadrangular, acute but scarcely taper- 

 ing, dark or olive-g, 2-6' long; sporangia 

 orbicular broadly-elliptic, with a nar- 

 row velum; ligula triangular, short or 



1002 



somewhat elongate; macrospores 0.5-0.8 

 mm in diam, marked all over with dis- 

 tinct or somewhat confluent crests; mi- 

 crosperes smooth, 0.035 0.046 mm long. 

 NY; NH; Mass; Vt. 

 Variety PAUPEBCULA Engelmann. 



Lvs fewer, shorter, thinner; spores 

 smaller, microspores somewhat granu- 

 late, 0.026-0.036 mm long. Synonym: I. 

 macrospora Durien. Grand Lake, Middle 

 Park, Colo (Engelmann): Castle Lake, 

 near Mt Shasta, Cal (Pnngle). 

 I: PYGMAEA E. B2:351. 



Lvs 5-10, stout, rigid, bright g, %-l 

 long, abruptly tapering to a fine point, 

 with very short often almost square epi- 

 dermal cells; sporangia orbicular with a 

 narrow velum; macrosperes 0.36-0.5 mm 

 thick, marked with minute, rather regu- 

 lar, distinct or rarely confluent warts; 

 microspores brown, almost smooth, 

 0.024-0.029 mm long. Mon Pass, Cal. 

 (Bolander). 

 I: TUCKEBMANI A. Br. 



Lvs 10-30, very slender, tapering, 

 olive g, 2-3' long, outer recurved; spor- 

 angia mostly oblong, w or rarely brown- 

 spotted, upper third covered by the 

 velum; macrospores 4.44-0.56 mm thick, 

 the upper segs marked with prominent, 

 somewhat parallel and branching ridges, 

 lower half reticulate; microspores 

 smooth or nearly so, 0.026-0.032 mm long. 



I: ECHINOSPOBA Durien, Soc bot Fr 



One of the smaller species, with 10-30 

 or 40 soft bright g or sometimes r'ish 

 Ivs, gradually and regularly tapering 

 from a thick base to a very slender 

 elongated point absolutely without sto- 

 mata, 2-4 or sometimes 5' long; spor- 

 angia orbicular to broadly oval, un- 

 spotted with a narrow, erect, truncate, 

 or slightly forked spinules; microspores 

 0.03-0.034 mm long, almost smooth. 

 Italy, France, Germany, England, Lap- 

 land, Iceland, apparently not in America. 

 **Stomata present. 



Variety BBAUNU E, St. Louis ac tr 

 4:379 (1882). 



Rather small, with 13-15 g or r ish-g, 

 erect or spreading, rather short (3-6 

 long), tapering soft Ivs, generally with 

 few stomata towards the tip only; spor- 

 angia orbicular to broadly elliptical, 

 spotted, generally % or even % covered 

 by a broad velum; macrospores 0.4-0.5 

 mm thick, rather a little longer, covered 

 with broad, retuse spinules, sometimes 

 somewhat confluent, and then dentate or 

 incised at tip; miscrospores 0.026-0.03 

 mm long, smooth. Nova Scotia; New 

 England; Pa; Mich; Utah; Greenland. 

 Synonym: I. Braunii Durien, Soc bot Fr 

 b 11:103. 

 Variety ROBUSTA Engelmann. 



Similar to var. Braunii, but much 

 stouter, with 25-70 Ivs, 5-8' long, with 

 abundant stomata all over their surface; 

 velum covering about V 2 of the large, 

 spotted sporangium; macrospores 0.36- 

 0.55 mm thick, with the sculpture and 

 miscrospores the same as of var. Bra- 

 unii. North end of Isle of La Motte, 

 Lake Champlain (C. G. Pringle). 

 Variety BOOTTII Engelmann. 



