. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. Botany. 300 specie of the north Besides the folio 3f North An umhc P. simpler itly axillary. nearly all of them ing at least too others occur in the western and northwestern parts in Arctic America. Type species : Potenlilla replans L. A. Flowers solitary, axillary, long-peduncled. Flowers 4-parted : upper leaves 3-folioIate. Flowers 5-parted : leaves usually a
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. Botany. 300 specie of the north Besides the folio 3f North An umhc P. simpler itly axillary. nearly all of them ing at least too others occur in the western and northwestern parts in Arctic America. Type species : Potenlilla replans L. A. Flowers solitary, axillary, long-peduncled. Flowers 4-parted : upper leaves 3-folioIate. Flowers 5-parted : leaves usually all 5-foliolate (genus Callioiiia Greene), Pubescence of the stem, petioles and peduncles appressed. Leaflets sparingly silky beneath, dentate nearly to the base. Leaflets densely silky beneath, dentate only above the middle. Pubescence of the stem, petioles and peduncles spreading. B. Flowers cymose. a. Cymes very leafy, several-many-flowered, the flowers or some of them appari Mainly annuals or biennials; style fusiform, glandular at the base. Achenes corky-gibbous. Leaves all pinnate : inflorescence evidently cymose. 5. P. Upper leaves ternate; inflorescence falsely racemose. 6. P. Nicolletii. Achenes not gibbous. Leaves all ternate : stamens 10-20. Petals about half as long as the : calyx-tube 2"-2^^" broad in fruit. 7. P. millegraua. Petals more than half as long as the calyx-lobes : calyx-tube il/2" broad in fruit. 8'. P. monspeliensis. Basal leaves apparently 5-foliolate; stamens 5. 9. Perennials; style filiform, not glandular. Leaves white-tomentose beneath. 10. P. argentea. Leaves grayish silky beneath. 11. P. intermedia. b. Cymes not very leafy, usually few-flowered. Leaves digitately divided. Basal leaves 5-9-foliolate. Plant tall, 1° high or more : introduced. Plants low, less than 8' high ; native boreal species. Basal leaves 3-foliolate ; boreal and alpine species. Leaves densely white-pubescent beneath. Leaves g
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
