Jonas Frei
@jdfrei.bsky.social
Naturalist, landscape architect, author
Walnut cross-sections.
Shell halves from various Juglandaceae species, genera Juglans & Carya.
A cultivated variety of the persian walnut is shown in the third row, left. Right to it is a wild form of from the same species.
From my reference collection for my book ‚Die Walnuss‘ (German).
Shell halves from various Juglandaceae species, genera Juglans & Carya.
A cultivated variety of the persian walnut is shown in the third row, left. Right to it is a wild form of from the same species.
From my reference collection for my book ‚Die Walnuss‘ (German).
November 15, 2025 at 11:24 AM
Walnut cross-sections.
Shell halves from various Juglandaceae species, genera Juglans & Carya.
A cultivated variety of the persian walnut is shown in the third row, left. Right to it is a wild form of from the same species.
From my reference collection for my book ‚Die Walnuss‘ (German).
Shell halves from various Juglandaceae species, genera Juglans & Carya.
A cultivated variety of the persian walnut is shown in the third row, left. Right to it is a wild form of from the same species.
From my reference collection for my book ‚Die Walnuss‘ (German).
Conifers. Cones from the genera:
Thuja, Thujopsis, Chamaecyparis, Pinus, Picea, Cypressus, Callitris, Taxodium, Tsuga, Cryptomeria, Calocedrus, Tetraclinis, Larix, Metasequoia
Thuja, Thujopsis, Chamaecyparis, Pinus, Picea, Cypressus, Callitris, Taxodium, Tsuga, Cryptomeria, Calocedrus, Tetraclinis, Larix, Metasequoia
November 6, 2025 at 11:14 AM
Conifers. Cones from the genera:
Thuja, Thujopsis, Chamaecyparis, Pinus, Picea, Cypressus, Callitris, Taxodium, Tsuga, Cryptomeria, Calocedrus, Tetraclinis, Larix, Metasequoia
Thuja, Thujopsis, Chamaecyparis, Pinus, Picea, Cypressus, Callitris, Taxodium, Tsuga, Cryptomeria, Calocedrus, Tetraclinis, Larix, Metasequoia
Quercus - Oak acorns
Species shown:
Q rubra
Q petraea
Q robur
Q agrifolia
Q coccifera
Q coccinea
Q palustris Q ilex
Q pubescens
Q frainetto
Q aucheri
Q macrocarpa
Q cerris
Q faginea
Q x hispanica
Q x libanerris
Species shown:
Q rubra
Q petraea
Q robur
Q agrifolia
Q coccifera
Q coccinea
Q palustris Q ilex
Q pubescens
Q frainetto
Q aucheri
Q macrocarpa
Q cerris
Q faginea
Q x hispanica
Q x libanerris
October 16, 2025 at 6:57 PM
Quercus - Oak acorns
Species shown:
Q rubra
Q petraea
Q robur
Q agrifolia
Q coccifera
Q coccinea
Q palustris Q ilex
Q pubescens
Q frainetto
Q aucheri
Q macrocarpa
Q cerris
Q faginea
Q x hispanica
Q x libanerris
Species shown:
Q rubra
Q petraea
Q robur
Q agrifolia
Q coccifera
Q coccinea
Q palustris Q ilex
Q pubescens
Q frainetto
Q aucheri
Q macrocarpa
Q cerris
Q faginea
Q x hispanica
Q x libanerris
Aegean pahtway finds.
October 12, 2025 at 12:08 PM
Aegean pahtway finds.
Peaches. Prunus persica cultivars including nectarines and some wild relatives like davids’peach P. davidiana, the rare fergana-peach P. ferganensis and hybrids to the almond; P. x amygdalopersica.
Photographed with the help of the INRAE peach collection.
Photographed with the help of the INRAE peach collection.
August 26, 2025 at 7:44 PM
Peaches. Prunus persica cultivars including nectarines and some wild relatives like davids’peach P. davidiana, the rare fergana-peach P. ferganensis and hybrids to the almond; P. x amygdalopersica.
Photographed with the help of the INRAE peach collection.
Photographed with the help of the INRAE peach collection.
Seedpods. Including some Australian natives like Eucalyptus, Casuarina, Brachychiton & Callistemon.
August 24, 2025 at 4:35 PM
Seedpods. Including some Australian natives like Eucalyptus, Casuarina, Brachychiton & Callistemon.
Seedpods.
Medicago, Eucalyptus, Silene, Quercus, Cistus, Papaver, Acacia, Casuarina
Medicago, Eucalyptus, Silene, Quercus, Cistus, Papaver, Acacia, Casuarina
August 24, 2025 at 4:34 PM
Seedpods.
Medicago, Eucalyptus, Silene, Quercus, Cistus, Papaver, Acacia, Casuarina
Medicago, Eucalyptus, Silene, Quercus, Cistus, Papaver, Acacia, Casuarina
5-25 mio years old fossil nuts - European forests of that time were rich in genera: butternuts (Juglans), hickories (Carya), storax trees (Styrax), hazelnuts (Corylus) and mastic seeds (Mastixia). Most of these species later went extinct in Europe during the ice ages.
May 26, 2025 at 7:24 PM
5-25 mio years old fossil nuts - European forests of that time were rich in genera: butternuts (Juglans), hickories (Carya), storax trees (Styrax), hazelnuts (Corylus) and mastic seeds (Mastixia). Most of these species later went extinct in Europe during the ice ages.
Bean diversity.
Mostly cultivars of Phaseolus vulgaris.
Mostly cultivars of Phaseolus vulgaris.
April 26, 2025 at 6:59 AM
Bean diversity.
Mostly cultivars of Phaseolus vulgaris.
Mostly cultivars of Phaseolus vulgaris.
Some australian seedpods; mostly casuarina and allocasuarina.
April 26, 2025 at 6:55 AM
Some australian seedpods; mostly casuarina and allocasuarina.
Juglandaceae. Walnut cross-sections of various species; mostly Juglans, some Carya.
From my book ‚Die Walnuss‘
From my book ‚Die Walnuss‘
February 11, 2025 at 6:02 PM
Juglandaceae. Walnut cross-sections of various species; mostly Juglans, some Carya.
From my book ‚Die Walnuss‘
From my book ‚Die Walnuss‘
Diversity of #Almonds. Wild species, cultivars, and a few hybrids.
-
Mandelvielfalt. Wildarten, Sorten und einige Kreuzungen.
#amygdalus
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Mandelvielfalt. Wildarten, Sorten und einige Kreuzungen.
#amygdalus
February 11, 2025 at 8:29 AM
Diversity of #Almonds. Wild species, cultivars, and a few hybrids.
-
Mandelvielfalt. Wildarten, Sorten und einige Kreuzungen.
#amygdalus
-
Mandelvielfalt. Wildarten, Sorten und einige Kreuzungen.
#amygdalus
Fabaceae seedpods & seeds
December 7, 2024 at 11:33 AM
Fabaceae seedpods & seeds
Zea mays. Seeds of a few corn varieties.
December 31, 2023 at 12:38 PM
Zea mays. Seeds of a few corn varieties.
Colorful corn (Zea mays) seeds from various cultivars, some of these are known as ‚glass gem corn‘.
November 23, 2023 at 6:01 PM
Colorful corn (Zea mays) seeds from various cultivars, some of these are known as ‚glass gem corn‘.
My two Monographs on the species, botany, history and culture of Walnuts and Hazelnuts. 'Die Walnuss' portrays the Juglandaceae, 'Die Haselnuss' the genus Corylus, the Hazels.
Including detailed illustrations and species portraits of all species. Written in German, available wherever books are sold
Including detailed illustrations and species portraits of all species. Written in German, available wherever books are sold
November 16, 2023 at 9:43 AM
My two Monographs on the species, botany, history and culture of Walnuts and Hazelnuts. 'Die Walnuss' portrays the Juglandaceae, 'Die Haselnuss' the genus Corylus, the Hazels.
Including detailed illustrations and species portraits of all species. Written in German, available wherever books are sold
Including detailed illustrations and species portraits of all species. Written in German, available wherever books are sold
Insects in baltic amber, frozen in tree resin 40 mio years ago.
November 14, 2023 at 8:01 PM
Insects in baltic amber, frozen in tree resin 40 mio years ago.
Aristolochia clematitis seeds
October 27, 2023 at 9:51 AM
Aristolochia clematitis seeds
The beauty of bean biodiversity.
Cultivars of phaseolus and vigna.
Cultivars of phaseolus and vigna.
October 25, 2023 at 6:14 PM
The beauty of bean biodiversity.
Cultivars of phaseolus and vigna.
Cultivars of phaseolus and vigna.
Botanical collectibles
October 24, 2023 at 6:08 PM
Botanical collectibles
Papaver. A few poppy seedpods.
P. somniferum P. argemone P. rhoeas P. dubium Meconopsis cambrica
P. somniferum P. argemone P. rhoeas P. dubium Meconopsis cambrica
October 14, 2023 at 4:02 PM
Papaver. A few poppy seedpods.
P. somniferum P. argemone P. rhoeas P. dubium Meconopsis cambrica
P. somniferum P. argemone P. rhoeas P. dubium Meconopsis cambrica
Seedpods. Casuarina, Allocasuarina, Liquidambar and others.
October 14, 2023 at 11:33 AM
Seedpods. Casuarina, Allocasuarina, Liquidambar and others.
Vases? Poppy seedpods.
October 11, 2023 at 6:15 PM
Vases? Poppy seedpods.