john-h-schaffner documents

Diagnostic Key to the Species of Equisetum (Continued)
Documents Diagnostic Key to the Species of Equisetum (Continued)
Diagnostic Key to the Species of Equisetum
Documents Diagnostic Key to the Species of Equisetum
On the Trail of Equisetum for Four Thousand Miles
Documents On the Trail of Equisetum for Four Thousand Miles
Geographic Distribution of the Species of Equisetum in Relation to Their Phylogeny
Documents Geographic Distribution of the Species of Equisetum in Relation to Their Phylogeny
A Contribution to the Life History and Cytology of Erythronium
Documents A Contribution to the Life History and Cytology of Erythronium
The Nutation of Helianthus
Documents The Nutation of Helianthus
The Reduction Division in the Microsporocytes of Agave virginica
Documents The Reduction Division in the Microsporocytes of Agave virginica
North American Species of Equisetum North of Mexico
Documents North American Species of Equisetum North of Mexico
The Division of the Macrospore Nucleus
Documents The Division of the Macrospore Nucleus
The Development of the Stamens and Carpels of Typha Latifolia
Documents The Development of the Stamens and Carpels of Typha Latifolia
Observations on the Nutation of Helianthus annuus
Documents Observations on the Nutation of Helianthus annuus
The Embryo-Sac of Alisma Plantago
Documents The Embryo-Sac of Alisma Plantago
The Nature and Distribution of Attraction-Spheres and Centrosomes in Vegetable Cells
Documents The Nature and Distribution of Attraction-Spheres and Centrosomes in Vegetable Cells
Contribution to the Life History of Sagitaria variabilis
Documents Contribution to the Life History of Sagitaria variabilis
Origin of Timber Belts
Documents Origin of Timber Belts
The Spreading of Buffalo Grass
Documents The Spreading of Buffalo Grass
Control of the Sexual State in Arisaema triphyllum and Arisaema dracontium
Documents Control of the Sexual State in Arisaema triphyllum and Arisaema dracontium