88 FLORA OF GRAND RAPIDS. 



in 1890 and 'i»l, but unfortunately no Rj)CcimenH wero preserved, 

 and the stations wore not note<l with certainty. 



POMACEAE. Ai'iM K Family. 

 AMELANCHIER Medic. Junk-hkhrv. 



690. A. Canadensis Medic. tSliad-bush. Service-berry. 



C'oniniun in moist woods. May. 



A shrub or small tree, the extremes of variation are: — First, 

 leaves ovate, sharply serrate, smooth; flowers in 0])en, drooping 

 racemes, petals an inch long, young shoots and racemes smooth: 

 Secondly, leaves smaller, racemes closer, petals shorter, young 

 shoots, leaves, and racemes densely tomentose. The fruit 

 is so eagerly devoured by birds that it is dilKcult to find it well 

 ripened. 



691. A. Canadensis oblongifolia Torr, & Gray. 

 A. Jiotri/ajnttm (L. f.) DC. 



A low shrub on light soil; infrequent. 



D. G. H. & M. Ry., east of the City; along Hogadone Creek. 



It blooms about two weeks later than the preceding species. 



692. A. rotundifoiia (Michx.) Koem, 



There are several clumps along the highway, east of Crooked 

 Lake. May. 



CRATAEGUS L. Hawthorn. White Thorx, 



The members of this genus are so variable and confusing 

 that it seems advisable to study first the most common species 

 in their order of flowering which is quite constant in ordinary 

 seasons as: 097 followed by 693, 690, 698, 694, 700. 



693. C. cocci nea L. 



Thickets and hillsides; common. May 20-30. 

 Leaves when young pubescent above, smooth beneath, rarely 

 pubescent at the veins; young shoots smooth; calyx-lobes, bracts, 

 and pedicels sparingly glandular. 



