MISSOURI BOTANICAL GARDEN BULLETIN 67 



LEAVES SLIGHTLY INJURED 



Crataegus songorica (hawthorn) 



Evonymus europaea (European strawberry-bush) 



Halcsia tetraptera (silver-bell) 



Ilex opaea (American holly), old leaves dropping, probably caused 



by frost 

 Populus deltoides (Cottonwood) 

 Populus italica (Italian poplar) 

 Populus tomentosa (poplar) 



SHRUBS 

 All species of Diervilla were killed to the ground, or the 

 wood was so severely injured that the plants had to be cut back 

 to the ground. A few plants protected by buildings escaped 

 serious injury, and a number transplanted some time previous 

 to the date of freezing escaped injury entirely. 



TWIGS OF LAST TEAR KILLED 

 Amorpha fruticosa, plants pruned during the winter escaped injury 

 to wood, while those not pruned were killed back considerably 

 Aralia spinosa (Hercules' club) 

 Berberis Thunbergii (Thunberg's barberry) 

 Caragana arboreseens 

 Corylus Avellana (hazel) 

 Deutzia gracilis 

 Deutzia scabra 

 Forsythia sp. 

 Kerria japonica 



Ligustrum ovalifolivm (California privet) 

 Lonicera fragrantissima (fragrant honeysuckle) 

 Lonicera Ledebourii (bush honeysuckle) 

 Lonirera Morrowii (Morrow's bush honeysuckle) 

 Rhus typhina (staghorn sumac) 

 Spiraea Bumalda var. "Anthony Waterer" 

 Spiraea Van Houttei (bridal wreath) 

 Viburnum tomentosum 



FOLIAGE KILLED 



Acanthopavax pentaphyllus 

 Cornus altcrnifolia (alternate-leaf dogwood) 

 Cornus Mas (Cornelian cherry) 

 Magnolia stellata (star magnolia) 

 Rhodotypos kerrioides (white kerria) 

 Sambucus sp. (elder) 

 Spiraea Douglasii 

 Syringa vulgaris 



The injury to herbaceous perennials was not so great. Those 

 in bloom at the time had their blossoms killed, and Polygonum 

 cuspidaium froze to the ground. 



