and clearings, wet woods, bogs and edges of ponds: forma i/laiicocarpa (Robins.) 

 Mackenzie, with fruits bluish and covered with bloom is general except in Coos 

 County but is less common than typical (See Rhodora 2:81-83, 1900) : forma Iciico- 

 carpa (Porter) Fern., with fruits whitish or pinkish has been collected in JafYrey 

 and W asliington. 



Vaccinium uliginosum L. var. alpinum Bigel. Alpine Bilberry. 



Confined to mountain areas in northern part of state, occasionally descending to 

 lower levels ; common in alpine region of Presidential Range and rocky slopes and 

 summits of lower mountains. 



V. caespitosum Michx. Dwarf Bilberry. 



Confined to northern New Hampshire ; common in alpine area on Presidentials, 

 less common in Franconia Range ; occasionally descending to lower levels in sandy 

 soils or river-ledges. 



Locally occurring species of the subgenus Cyauococcits (blueberries) may cross 

 and produce fertile hybrids if the chromosome-numbers are similar. Vaccinum myrtil- 

 loidcs with 2-n chromosomes is thus compatible with V. aiigustifoliiiii also with 2-n 

 chromosomes, J\ aiujiisfifoliuiii var. lacz'ifoliitiii with 4-n chromosomes is compatible 

 with / '. curyinbosuiii also with 4-n chromosomes but not with V. atrococcum wdiich 

 iias 2-n chromosomes. V. vacillaiis also with 2-n chromosomes might be expected to 

 cross with V. iiiyrtilloidcs or /'. aiujitstifoliiiiii if their ranges and habitats coincided. 

 First generation progeny of J'- aiu/itstifoliuiii var. lacvifoliiiiii with f. corymbosum 

 are dark-fruited; later segregates are very diverse as to stature, fruit-color, size, 

 etc., creating a taxonomic morass for the uninitiated. 



V. myrtilloides Michx. Sour-top Blueberry. 



Of rather general occurrence at low and medium altitudes throughout New 

 Hampshire extending upward to rocky slopes of White Mountains ; common in 

 northern parts of state, becoming scarce southward: hybrids with other species of 

 Vaccinium are not commonly found in Xew Hampshire ; one reputed to be V . 

 myrfilloidcs, X. V. aiuj'isfifoliuin var. nii/nim was collected in Randolph: forma 

 chiococciiin (Deane) Fern, with whitish fruits has been collected in Gorham and 

 reported from Shelburne by Farlow in Garden and Forest 2:50-51, 1889. 



V. vacillans Torr. Early Sweet Blueberry. 



Common in southern New Hampshire, extending northward to Orford, Franklin, 

 and Alton ; outlying station in Shelburne ; dry woods and warm rocky slopes. 



\'ar. crinitum Fern. 



Perhaps chiefly represents hybrids of J', z'acillans and V. atrococcum or V. myrtil- 

 loides; specimen from Sumner's Falls, Plainfield, approaches it. 



V. angustifolium Ait. var. angustifolium. Low Sweet Blueberry. 



The diploid element of the species is chiefly montane to alpine in New Hampshire, 

 with often somewhat questionable specimens from lower elevations; variations in 

 height of stems and even in leaf-form are often variable in the same clone depending 

 upon environmental conditions; var. anc/ustifoliuiii is common in alpine areas in dry 

 locations, occasionally on lower mountains and at lower elevations. 



\'ar. laevifolium House. 



Tetraploid derivative of the last-named ; common throughout ai low and medium 

 altitudes; in well drained and often rocky, acid soils: forma Icucocarf^uir, with fruits 

 whitish has ibeen collected in Fitzwilliam (see Rhu'J. 3:263, 1901); pinkish-fruited 

 plants occur in Strafford. 



Var. hypolasium Fern. 



Now considered to be a hybrid of J\ iuifiustifolium var. aiH/ustijdliuin and V. 

 myrtilloides ; occasional throughout. 



Var. nigrum (Wood) Dole. 



Less common than, but of same general range and habitat as var. laevifolium.: 

 often confused with black fruited hybrids of var. laevifolium and V. corymbosum. 



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