Lenny [Leonard Darwin]’s illness.
Polymorphism in valerian and Lythrum salicaria.
Showing 21–37 of 37 items
Lenny [Leonard Darwin]’s illness.
Polymorphism in valerian and Lythrum salicaria.
Leonard’s illness.
Polymorphism in valerian and Erythraea.
JDH’s trip to Switzerland with his wife.
Has seen Oswald Heer’s fossils, including a leaf, apparently dicotyledonous, from the Lower Lias in Jura.
Value of insect and crustacean fossils for systematic determination.
JDH "impressed with identity of physical features and what wonderful analogy of biological [features] between Alps and Himalayas".
Relates death of H. G. Bronn.
Discusses publication of German edition of Orchids [1862].
Will be sending information on peloric plants from his father [William Masters] soon.
Sends observations on Valeriana officinalis.
Offers to translate Orchids, since H. G. Bronn has died.
Continues breeding guinea-pigs to test effects of warmth on gestation period. Concludes period is ten weeks and warmth has no influence. Offers CD the specimens.
Awaits Variation.
Encloses stamps for Leonard Darwin.
Asa Gray has a self-fertilising Platanthera, like the bee orchid. CD believes problem of the latter will some day be explained. Speculates [Ophrys] arachnites may be crossing form and bee orchid self-fertilising form of the same species.
Cytisus adami is a puzzle.
Pleased if DO will review Orchids [Nat. Hist. Rev. n.s. 2 (1862): 371–6] .
His review of Primula paper was capital. [Nat. Hist. Rev. n.s. 2 (1862): 235–43].
Requests peloric plants.
Illness of his son [Leonard]. Has done no work for weeks.
JDH’s hybrid orchids are interesting; CD is surprised many hybrids are not produced.
George [Darwin] caught a moth sucking Gymnadenia conopsea with a pollen-mass of Habenaria bifolia sticking to it.
Sends orchids from W. H. Gower.
Invites CD and Emma to dine.
Is observing Gymnadenia tridentata.
Has received six copies of Orchids.
Cares more for dimorphism now than for orchids. Today saw the three forms of Lythrum, which means there should be 18 different practicable crosses.
His gardener kept an all-night watch on Epipactis palustris but saw no insects visit.
Offers more Epipactis.