Among other of its uses (for honey, tea, and of course for carbon sequestration), the linden (or basswood) is a soil improver.  Along with significant amounts of NPK, basswood leaves are high in calcium and magnesium.  Compost it.

Additonal plates (Brockhaus) are shown below:

species illustrated are:

(top left) Picea abies,  Norway spruce

(top right) Abies alba, Silver Fir or “Swiss Pine”;

(bot left) Larix europeaa, European larch

(bot right) Pinus sylvestris, Scots pine, scotch pine  

unfinished  

above: new growth prior to flowering;

note: all species of the genus Pinus  are monoecious

(staminate and pistillate flowers are borne on the same tree)

species illustrated are:

(top left) Acer pseudoplatanus, Sycamore Maple

(top right) Carpinus betulus, European hornbeam

(bot left) Populus tremula, European aspen

(bot right) Betula verrucosa, European white birch 

Populus tremula  is a member of the Salicaceae family (355 spp.);

distinctive of the family is its fruit, a ‘valved capsule’ (see inset #1 above)

which bears ‘tufted’ seeds which everyone witnesses in the spring as

an unbelievable mass quantity of wind-blown white ‘cotton’.

Populus tremula shares botanical features with the Quaking aspen (P. tremuloides);

The most often noted feature of the species is its quaking or trembling leaves.  This is due to the geometry of its petioles (flattened in x-section). 

species illustrated are:

(top) Alnus glutinosa, European black alder

(bot) Fraxinus excelsior, European ash 

The genus Fraxinus (Ash) belongs to the Olive family;

but not doubled as with the maples (see Acer pseudoplatanus above);

in terms of leaf composition, the leaves of the ash are compound (3 or more leaflets attached to a common stalk, or rachis);

 its leaflet shape is several times longer than broad, or lanceolate (a keen word in my book). 

subject for some near- future gallery challenge?

note: reproductions, et al,  by ume