50 NATUIiAL mSTOJlY OF I'LAXT,^. 



of its genus, grows in Caniida and the United States. From its stock 

 a stem arises in the spring, which bears only a small number of 

 alternate petiolate palmatifid leaves,' and is terminated by a solitary 

 flower. 



III. CLEMATIS SERIES. 



The genus CIcmnfir has regular, usually hermaphrodite, liowers. 

 In a large number of the species cultivated by us as ornamental 

 plants — as, for instance, C. luoiita/ia, Bkntii. (tig. 8'J) — we tind at the 

 base of the convex floral receptacle (tigs. 90, 91) a single petaloid 

 perianth consisting of a calyx of four free sepals,' valvate of in- 



FiG. 89. 

 Flower. 



Clematis montana. 

 Fig. 90. 

 Longitudinal section of flower. 



Fig. 91. 

 Diagram. 



duplicative^ prsefloration. The numerous hypogynous stamens eacli 

 consist of a free filament, and a basiflxed anther with two lateral 



* The superior leaf is usually sessile. The in- 

 ferior has often two small glands at the base of 

 its petiole. 



» Clemalu L., Gen., n. G96.— .Tuss., Oen., 

 232.— DC, Prodr., i. 2.— Knul., Oen., n. 4768. 

 — Spacii, Suit, a Buff., vii. 257. — K. II., Gen., 

 8.— Walp., Rep., i. 3; ii. 737; v. 3; Ann., \. 

 3, 953; ii. 3, 5; iv. 3, \).— Clematilis T., Instit., 

 293, t. 150; Cor. 20.— Triffula NoiiONir. — 

 Stylurun ]{ AVIV.— Cletnalopsi.1 Ho.i. 



^ Two of these sepals are lateral ; the two 

 others are anterior and ixwterior. Pater 

 (Organoff., 252) has seen tliat Ihcj arise in twos; 

 the former ])air after the latter. 



* Tlic sepals therefore touch, not hy their 

 edges, hut hy the lateral jKirtions of their outer 

 Burface. The jK<rtion thus iiitlectetl in tiie hud 

 varies in extent in different species ; and wlieii it 

 is very large tlie sepal is here tiiinner, and usually 



of a paler tint. Later on, after tiie exjwnsion of 

 the flower, the sepals which were valvate may even 

 overlap one another by the thin ex])anded 

 margins, as we have ascertained {Athnisunia, 

 iv. 53). We have also shown (/. cif., 55) that 

 then the flower of a ClfiiialiK Ik-coiucs exactly 

 that of an Anemone, and so the two series are 

 closely hound together, and might even !« ctin- 

 founded when we add that "the outer staniens of 

 Clematis become staminmles in Atrai/ene and 

 Naravelia, as happens in the section J'ttUalilla 

 of the genus Anemone ; that the fruit of this sjinie 

 Pulsatilla is exactly that of Flummula ; and 

 Anally, that in Chdropx'rs the flower has an in- 

 vohicre wanting in the other sections of the genus 

 Clematis, hut recidling that t>f the true Ane- 

 mones." The habit, too, of, ^Mf^moM*" ya/>OHic<i is 

 met with in C. tubulosa and some others. 



