Robert W. Freckmann Herbarium

Taxonomy of Vascular Plants

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Plants of Wisconsin

Vascular Plants

Winter Key to Some Common Genera of Deciduous Woody Plants of the Upper Midwest

Glossary drawings

 

40a.

Stipules persistent, although sometimes tiny

41

 

40b.

Stipules represented by elongate scars only

42

41a.

 

Stipules conspicuous, encircling stem; bark brown, shredding; small shrub

Potentilla

41b.

 

Stipules tiny, not sheathing stem; large shrub or small tree

Ilex

 

42a.

Accessory buds above axillary buds

Amorpha

 

42b.

Axillary buds only

Ceanothus

43a.

 

Terminal bud present

44

43b.

 

Terminal bud absent

Vaccinium

 

44a.

Leaf scars very rough and uneven; bark bronze brown

Spiraea

 

44b.

Leaf scars even and nearly smooth; older bark smooth gray with white shedding crust

Nemopanthus

45a.

 

Bundle scars more than 3, not in a crescent shaped line

46

45b.

 

Bundle scars 3 or sometimes more, in a single crescent shaped line

55

 

46a.

Buds crowed near tip of twig

Quercus

  46b. Buds not crowded near tip 47

47a.

 

Stipule scars present

48

47b.

 

Stipule scars absent

53

 

48a.

Terminal bud present

49

 

48b.

Terminal bud absent

51

49a.

 

Bud scales overlapping; buds narrow, acute, twigs slender

Fagus

49b.

 

One or two cuplike scales over terminal bud, buds large, blunt; twigs stout

50

 

50a.

Terminal bud with one scale, not flattened; leaf scars U-shaped

Magnolia

 

50b.

Terminal bud with 2 scales, flattened; leaf scars circular

Liriodendron

51a.

 

2 visible bud scales; buds smooth, reddish; twigs smooth, reddish or greenish gray; no catkins

Tilia

51b.

 

4 or more visible bud scales; buds and twigs grayish; sometimes with catkins

52

  52a. Buds oval and spreading; tall shrubs Corylus
  52b. Buds triangular and appressed; trees Morus
53a.   Twigs relatively slender, with strong odor when crushed; buds covered with yellow hairs, partially hidden under leaf scar Rhus
53b.   Twigs stout, not aromatic when crushed; buds large, conspicuous 54
  54a. Bark of twigs yellowish-brown, mottled; shrub Toxicodendron
  54b. Bark of twigs grayish; trees; with either large terminal bud and overlapping scales, or yellowish with scales meeting laterally Carya

 [Page 1, 2, 3,- 5, 6, 7] Glossary drawings


         
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