362 



NATURAL HISTORY OF PLANTS. 



Irom the Altiii and the Himahiyas, whose flowers are polygamous, 

 but in other respects altoi^rether those of Sihhaldia. 



In the above reduced types whicli we have referred to the genus 

 Polent'dia, when tlie androceum is only isostemonous, the persisting 

 stamens are those superposed to the sepals. In the plants of which 

 the genus C/iamcpr/iodos' has been made, the five oppositipetalous 

 stamens alone persist.* The number of carpels varies ; the ovule is 

 always that of Pofcntillft, and the style is inserted at a variable height 

 on the internal angle. The inflorescence is often, as in Strllariopsis, 

 analogous to that of the C(irt/ojj/ii///ac<'tp, and the hradeuJie forming 

 the calycle are absent or reduced to very rudimentary glands, as we 

 shall find is the case in certain species of Geum. Thus, Chanicerhoduis 

 is no more separable from the genus Putenfil/n than Si/jbaklia, Ivesia, 

 &c., and forms only a section apart. This is represented by four or 

 five herbaceous plants, with the stem IVutescent at the base, and 

 with alternate leaves like those of the Tormentil ; they are found in 

 the centre and north of Asia, and also in America on the Rocky 

 Mountains. 



Thus constituted, the genus PotcntiUa, with its eleven sections,' 

 includes about two hundred and fifty species, according to most 

 descriptive works ; but this number should be reduced by at least 

 a third. 



The Brambles' (Fr., llonceti — figs. 4:28-431) may be very briefly de- 

 fined now that we know the two preceding genera. Their flowers are 

 those of the Strawberries and Potentils, but have no calycle ; and their 

 Iruits consist of a variable number of drupes, not aehenes, inserted 

 on the convex surface of a receptacle which is less fleshy than in 



' Hoe., Ledeh. FL All., i. 42'J.— Ledeb., 



Icun. Fl. lto»a., t. 257, 271.— Ekdl., Oen., n. 



C:«i5.— Touit. & (ju., Ft. Bor.-Amer., i. 433. 



-Wah'., Hep., ii. 37, 913.— B. H„ Oen., 621, 



n. lU. 



• Kach coiiHint,-! of :i mthcr slondfT tilimicnt 

 mill ill! iiitrorHi' two-cfllL-d iiiitla-r. On tlic iniuT 

 liicu th«ie cillsi uro only Hi'i»uraleU from unotla-r 

 liy a hIiuIIow (groove; tlie Hiu-h of ililimiH-iiiv 

 form two arcu with tlit-ir concavilii-h fm in^, and 

 iinully iiltnoMt touch ul ImjIIi eniU, iiiarkin^ out a 

 hort of (lii|), tlie form ofuliidi ini^lit at tir.st 

 "•ijj'lit give the jiiii»ri-M*ion tliat tliu antliur \va.«< 

 uniloculnr. 



» Potenlilla. 



S<H.t.onHll. ) ^ ,.„,„„„„//„ ^ 



3. Comannn, 



4. Frat/ariaalntm. 



5. TrichothaUtmua. 



6. Sihbaldia. 



7. Dryitddiiihe. 

 «. Jloikelia. 

 I). Jresia. 



1(1. Shliariopxii. 



11. Chamaihodos. 

 liul,u.i \.; (Jen., n. r>32. — Al)AN8., Fam. de* 

 -J., (int., 338. — (t.KUTN., Fmct., 

 i. 350, t. 73.— Lam K., Diet., vi. 235 ; Suppl., iv. 

 Gi)3; III., t. ill. fig. 1.— IK"., Prvd,:, ii. 550.— 

 Si'Aiii, Suit, a HuJJ'iiH, i. 453. — K.VDL., Uen., 

 n. ()3G0.— rAVKK, OniaHop., 603, t.ti. tigu. 1-12. 

 — IJ. 11.. Oen., <)lt>". n. 'iy\.-Y CtiUiclU Wxv., 

 Sillim. Jouni. (IHIU). 377 (ox KndV.). 



Sections 11 

 (continued). 



PL, ii. 2'Ji.- 



