422 



916. CHA.RA. 



b. Whorled Branches di-trkhotomous. Fruit 



at the forks, clustered. 



12. hyalina. " Div. of Branches inflated, 

 acuminate. Seeds larger than in C. glomerata." 

 — Braun. 



13. prolifera. "Branches very long, sim- 

 ple, of 2 or 3 fructiferous whorls, short, forming 

 a head. L. (or Branches) divided at the lower 

 joints. Seeds very smooth, with hardly con- 

 spicuous striae. Mayence." — Braun. / do 

 not understand this description, which, per- 

 haps, may indicate a structure like that of C. 

 translucens. 



14. polyspermia. "Lower Branches 

 mostly subdivided. Mtp. Cors." — Braun. 

 Seems to he very like C. prolifera, hut to dif- 

 fer hy its larger size, and hy having the up- 

 per hranches undivided. 



c. Whorled Branches di-trichotomous. Fruit 



solitary. 



15. brongniartiana. " Whorled Bran- 

 ches simply di- or trichotomous, acute. Lorr. 

 Als. Palat." — Coss. C. flexilis of Braun, ac- 

 cording to Coss. 



16. ^acilis. Branches lax, more than 

 once divided, capillary; terminal Div. mucro- 

 nate, composed of 2 joints shorter than the 

 rest. 6-8. Sandy pools. Very rare. 



17. mucronata. Branches lax, more than 

 once divided, not capillary ; terminal Div. mu- 

 cronate, composed of 2 joints shorter than the 

 rest. 6-8. Still water, rare. 



18. teuuissima. Branches short, forming 

 dense tufts, and giving the plant a beaded ap- 

 pearance, more than tvrice divided. Terminal 

 Div. longer than the others. 6-8. Featy 

 pools. Fare. 



iv. Anthers on a different plant. 



19. syncarpa. Pruit clustered, without 

 bracts. Whorled Branches sometimes forked. 

 6-8. Stagnant. Cosson puts to this C. flexilis 

 of Smith, and capitata of Braun. C. flexilis 

 of Linn, he pronounces to he a different spe- 

 cies. Wallroth considers flexilis, Sm., nidifica, 

 syncarpa, graciKs, and translucens, as all he- 

 longing to C. flexilis of Linn., and adds, as a 

 var., glomerata «;e6?tenuissima, under the name 

 of steUata. 



CXV. EQUISETACE^. 



917. EQUISETUM. 



Ai. Barren and Fertile Stems distinct, dissi- 

 milar: the former simple, appearing hefore 

 the others ; the latter with whorled, simple 

 hranches. 



1. Telmateja. Sheaths of fertile Stems 

 with 30-40 teeth. Whorls of baiTen Stem 

 of about 30 branches, which are 4-edged, 

 with a furrow on each edge. p. 4. Damp 

 woods and hanks. A head of fructification 

 sometimes occurs on the harren stems. 



2. arvense. Sheaths of fertile Stems loose, 

 remote, with about 8 teeth. Branches of bar- 

 ren Stem 6-12 in a whorl, with 4 simple 

 edges. Stem roughish, with about 12 furrows. 



B. Barren and Fertile Stems appearing toge- 

 ther ; the latter at first simple, hut after- 

 wards throwing out branches, and resemhling 

 the harren. 



3. uaabrosum. Sheaths of fertile Stems 

 approximate, with 12-14 teeth. Branches of 

 barren Stems 6-12 in a whorl, simple, and 

 with 4 simple edges. Stem rough, with about 

 20 stripes, p. 5, 6. Moist meadows aiid 

 woods. G. Br. I. Pyr. 



4. sylvaticum. Barren and Fertile Stems 

 each with about 10 furrows. Branches of bar- 

 ren Stems compound, deflexed. Sheaths of 

 Stem lax, with about 4 broad, membranous 

 teeth, p. 5, 6. Hoist shade, occ. 



O. Barren and Fertile Stems always similar, 

 i. Catkins ohtuse. 



5. limosum. Stem smooth, with 14-16 

 stripes, often nearly simple. Teeth of the 

 Sheaths 10-20, short, rigid, acute. Branches 

 erect, rmdivided. p. 7- Water. 



6. palustre. Stem with 5-8 furrows, 

 branched. Sheaths loose, pale, tipped with 

 brown. Teeth 6-8. p. 6, 7. Boggy. 



ii. Catkins with an apiculus. 



7. ramosum. Stems numerous, with 8- 

 1 5 simple, rounded ribs. Branches few, irre- 

 gular. Sheaths green. Teeth 6-8, convex, 

 but with a central furrow, dark at base, but 

 with a whitish, membranous, finely acute mar- 

 gin, p, 7, 8. Dry or sandy, s. Eur. 



8. hyemale. Stem simple, very rough, 

 with 14-24 furrows. Sheaths close: their 

 Ribs nearly flat, with a fiue dorsal depression, 



