. Un manuale di erbacce : con le descrizioni di tutti i più perniciosi e fastidioso piante negli Stati Uniti e in Canada, le loro abitudini di crescita e di distribuzione, con metodi di controllo . Le erbacce. RANUNCULAOEAE (Famiglia CROWFOOT) 167 curarin, è stato estratto da entrambe queste specie. (Fig. 113.) l'impianto scaturisce da un cluster di thickish, oblunga di tuberi e sfrangiato con fine alimentazione di radichette. Stelo semplice e snello, spesso piegato o flexuous, sia esso e il fogliame finemente hairy; foglie inferiori hanno lunghi piccioli, lievemente dilatato a base e sono profondamente cinque-parted, i segmenti di nuovo due volte o th

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. A manual of weeds : with descriptions of all the most pernicious and troublesome plants in the United States and Canada, their habits of growth and distribution, with methods of control . Weeds. RANUNCULAOEAE (CROWFOOT FAMILY) 167 curarin, has been extracted from both these species. (Fig. 113.) The plant springs from a cluster of thickish, oblong tubers, fringed with fine feeding rootlets. Stem simple, slender, often bent or flexuous, both it and the foliage finely hairy; the lower leaves have long petioles, slightly dilated at base, and are deeply five-parted, the segments again twice or thrice divided; the upper leaves are small, oftenest of three nearly linear segments. Raceme terminal, slender, the flowers few, on long, nearly erect pedicels; they are large and showy, deep violet-blue, the sepals and the spurs nearly equal in length, bearded outside; the two upper petals are yellowish but are distinguishable from D. bicolor because they are not net-veined. Follicles three, widely re- curving at maturity, the seeds black and winged on the outer angles. Means of control the same as for Del- phinium bicolor. WESTERN LARKSPUR Delphinium trollifblium, Gray. Fig. 113. — Small or Menzies Larkspur (Del- phinium Menziesii). X i- Native. Perennial. Propagates by seeds. Time of bloom: April to June. Seed-time: June to August. Range: Oregon, Washington, Idaho and British Columbia. Habitat: Moist soil along streams, foothills; meadows and pastures. A very beautiful plant but in some localities it bears the un- pleasant names of Cow-poison or Cow-killer. Stem two to five feet tall, slender, leafy. Leaves large, three- to seven-parted, often somewhat kidney-shaped at base, the segments wedge-shaped and deeply cut and lobed at the tips. Racemes large and loose, often. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the orig

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• bookcentury1900
• bookdecade1910
• booksubjectweeds
• bookyear1919