BOTANY. J 63 



back to the tube of the calyx. The species are all from temperate North 

 and South Africa, herbaceous, with leaves once or twice pinnatiticl. 

 Examples : Neurada, Grielum. 



Trihc 3. Dryadece. Divisions of the calyx five, rarely four or more, the 

 aestivation usually valvate, often doubled by an exterior calicle produced by 

 the coherence of the calycinal stipules. Petals of the same number with 

 the divisions of the calyx, sometimes 0. Stamens definite or indefinite. 

 Carpels often numerous, sometimes reduced in number, borne on a central, 

 more or less projecting, receptacle ; free, with a terminal style, or more 

 frequently lateral, each containing one or two ovules, upright or suspended, 

 and subsequently a like number of dry or fleshy achnenia. Trees or shrubs, 

 with leaves compound, digitate or pinnate, rarely simple. Inhabitants of 

 temperate regions for the most part ; some found at great elevations. 



Suh-trihe 1. Dalibcurdecß. No calicle. Stamens indefinite. Carpels 

 numerous, with the styles terminal. Eadicle superior. Examples : *Dali- 

 barda, *Rubus. The latter genus includes the various species of 

 Raspberry and Blackberry, of which there are twenty-three North American 

 species. 



Si(h-tHhe 2. Fragariece. Calyx calicled, with valvate {estivation. 

 Stamens indefinite. Carpels numerous, with the styles lateral. Radicle 

 superior. Examples : *Fragaria, *Potentilla. The former §enus includes 

 the Strawberries, of which two species are indigenous to the United States. 

 One of these is F. vesca, the cultivated species, introduced into gardens, 

 from Europe, nevertheless wild in the Northern States. The other is F. 

 virginiana, the common wild strawberry. The two are readily distinguished 

 by the fruit. The latter has theachsenia (" seeds") completely embedded in 

 the deeply-pitted pulp ; in the former they stand out. 



Suh-trihe 3. Charnosrhodsce. Calyx, with or without calicle, aestivation 

 valvate. Stamens five to ten. Number of carpels the same, or a little 

 greater, the styles nearly or quite lateral. Radicle superior. Examples : 

 *Horkelia, "Sibbaldia, *Cham8erhodos. 



Sub-tribe 4. Sanguisorbece. Calyx with valvate or imbricate aestivation, 

 with or without calicle, hardening and closing above the ripe carpel. 

 Corolla mostly none. Stamens one to fifteen. Carpels two, rarely more. 

 Styles terminal or lateral. Radicle superior. Examples : "- Agrimonia, 

 *Sanguisorbia. 



Sub-tribe t). Cercocarpeoe. Calyx without a calicle, aestivation imbricated. 

 Petals five or 0. Stamens numerous. Carpel single, with the style 

 terminal. Radicle inferior. Examples : *Cercocarpu8, *Purshia. 



Svh-tribe 6. Eudryadece. Calyx with valvate aestivation, with or without 

 calicle. Stamens numerous. Carpels numerous, with the styles terminal. 

 Radicle inferior. Examples : *Geum, *Dryas, * Waldsteinia. 



Tribe 4. SpircBacece. Limb of the calyx with five divisions, more or less 

 deep, aestivation imbricate, more rarely valvate. Petals of the same 

 number. Stainens indefinite. Carpels five, more rarely reduced to two, 

 and even one, free, verticillate, styles usually terminal, containing one, two, 

 or more ovules, suspended or ascending, becoming of the same number of 



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