991 



992 



PLOWERLESS PLANTS OP THE EQUISETACEAE. Cylindric jointed hol- 



TT-Krrm-n-rk mui , ____ , low-stemmed plants, with toothed 



UNITED STATES sheaths. Fructification in a terminal 



CRYPTOOAMOUS or flowerless plants, OPHIOGLOSSACEAE Fronds often 



Sr Ve ni, b tii a , ring trUG flowers H w " h stamens ?elt e^^^rnation SporangiS 



Or pistils, are reproduced by minute 



homogenous bodies, called spores, in 



pnriar>Pmi5 in 



coriaceous ' in 



<5rikp? or 



spikes 



dlstlnct axis - 1VCOPODIAOEAH. Club-Moss or 

 >, Ground-Pine. Moss-like, terrestrial 

 by (tn sman lanceolate or subulate, 





-t /i 



the other smaller and containing anther- 



of two kinds, apothecia and spermo- 



PUNOI. Parasitic, wholly without chlor- 

 ophyll. the organs of vegetation (myce- 

 Hum) mostly subterranean or concealed, 



and st?u??ur C e iVe ^ Vai>i US in f rm 

 ALGAE Aquatic, mostly submerged, not 



t JS?? 



Spores * oi both kinds 

 caosules borne 



Y 



or VASCULAR AC- 



ROOENS. Plants with both woody and 

 cellular tissue: reproductive organs of 

 one or both sexes produced upon a pro- 

 thallus developed from the spore. 

 CELLULAR ACROOENS. Plants with 

 cellular tissue only: reproductive or- 

 gans borne upon the stem or branches. 

 These are commonly divided into four 

 large orders, characterized as follows: 

 "Capsules mostly opening by a lid, con- 

 taining num spores without spiral fibres, 

 MUSCt. Branches not regularly fascicled 

 along the stem. Tissue of the leaves 

 homogeneous Spores of one kind 

 SFHAGNACEAE. Branches regularly 

 fascicled. Tissue formed of colorless 

 cells and intermediate green linear 

 ducts. Spores of two kinds. Pale 

 flaccid bog plants. 



**Capsule not opening by a lid: spores 

 mixed with spiral fibres (elaters). 

 HEPATICAE. Stems procumbent, leafy 

 with alt or distichous Ivs, or thalloid 

 ***Sporangium consisting of a single 

 spore surrounded by spirally arranged 

 tubes. 



CHA11ACEAE. Submerged aquatics, with 

 whorl ed branches, consisting of tubular 

 cells placed end to end. 

 PTEEIDOPHYTA Cohn. Vascular Aero- 

 gens. 



These are placed in two divisions. 



I. ISAPOROUS VASCULAR ACRO- 

 QENS. Spores only of one' kind, the pro- 

 thallus bearing organs of both sexes, 

 This group comprises the following or- 

 ders: 



Order OPHIOQLOSSACEAE Lindley. 

 BOTBYCB3UM Swz. Grape-fern. 



Sporangia in pinnate or compound 

 spikes or panicles. Veins free. Spores 

 copious, sulphur-yellow. 

 Section EUBOTRYCHIUM Bud enclosed 

 in the base of the stalk. 

 *Vernation wholly straight. 

 B: SIMPLEX E. Hitchcock. 



Plant 2-7' hi, fleshy; sterile seg stalk- 

 ed, varying in insertion from near the 

 rtstalk to two-thirds the night of st. 

 ovate, obovate or oblong, entire, incised, 

 or pinnately parted into 1-3 pairs of 

 roundish or semi-lunate lobes; fertile 

 spike long-stalked, simple or V 2 -pinnate; 

 spores largest of genus, closely covered 

 with small points; bud smooth; apex of 

 both sterile and fertile seg erect. 

 New England, NY, northward. 

 Variety COMPOSITUM Lasch. 



Sterile seg composed of 2 or 3 pin- 

 nately incised divisions. Wyo; Cal. 

 **Vernation partly inclined in one or 

 both portions. I Buds smooth; sterile 

 seg sessile or short-stalked; plant small, 

 fr'ng in early summer. 

 B: L UN ARIA Swz. 



Moonwort. Plant 5-8' hi, fleshy; sterile 

 seg nearly sessile, borne near the mid- 

 die of stalk, oblong, simply pinnate with 

 5-15 lunate or fan-shaped lobes which 

 are crenate, incised, or entire, close and 

 overlapping, or distant; fertile seg bi- 

 tri-pinnate, panicled, about the hight of 

 the sterile. Apex only of sterile seg 

 bent over and outside of the nearly 

 straight fertile seg in vernation; divis- 



