316 



MEMOIRS OP THE NEW YORK BOTANICAL GARDEN 



[vol. 10 



On Myrica 



Aecia aecidioid, peridial cells with thick outer wall, smooth, thinner inner wall, ver- 



rucose, spores 24-30 X 27-34 /i. ellisii 



On Peraphyllum 



1. Aecia roestelioid. 



2. Peridium rupturing at apex and along the sides, peridial cells semi-rugose. nclsoni. 

 2. Peridium rupturing at apex, not lacerate along sides, peridial cells verrucose. 



inconspicuum. 



On Philadelphia 



Aecia roestelioid, peridium tubular, peridial cells verrucose. 



On Photinia (Pourthiaea) 



1. Aecia roestelioid. 



2. Peridial cells subspinulose. 



2. Peridial cells verruculose. 

 1. Aecia cupulate. 



3. Aeciospores medium-sized (18-23 x 23-30 /a), wall 2-3 fi. 

 3. Aeciospores small (17-19 X 19-24 /*), wall 1 (Aecidiirm) . 



On Pyrus 



1. Aecia aecidioid. 



2. Aeciospores small (18-20 X 14-23 n). 



2. Aeciospores large (23-27 X 27-39 fi). 

 1. Aecia roestelioid. 



3. Peridium losing tubular form, becoming lacerate and spreading. 

 4. Peridial cells rhomboid in side-view. 



5. Peridial cells rugose, aeciospores brown. 



5. Peridial cells verrucose, aeciospores yellow. 

 4. Peridial cells linear-rhomboid in side-view. 



6. Peridial cells verrucose. 

 6. Peridial cells rugose. 



7. Inner and side walls moderately rugose, medium 3-5 fi. 

 7. Inner and side walls strongly rugose, thick, 5-7 fi. 

 3. Peridium retaining tubular form, rupturing at apex. 

 8. Peridium cylindrical, long (3-6 mm). 

 8. Peridium cylindrical, medium (2-5 mm). 

 9. Peridial cells tuberculate. 

 9. Peridial cells rugose or parallel-striated. 

 3. Peridium balanoid, rupturing along sides, apex remaining bluntly conic. 



speciosum. 



japonicum. 

 asiaticum. 



wenshanense. 

 pourthiaeae. 



libocedri. 

 nootkatense. 



Cunningham ion urn. 



clavipes. 



clavariiforme. 



globosum. 

 confusum. 



asiaticum. 



Jcernianum. 

 shiraianum. 

 fuscum. 



On Sorbus 



1. Aecia aecidioid. 



2. Aeciospores small (18-20 X 14-23/*). 



2. Aeciospores large (23-27 X 27-39 /x). 

 1. Aecia roestelioid. 



3. Peridium retaining tubular form, dehiscent at apex. 

 4. Peridial cells rugose. 



4. Peridial cells verrucose. 

 4. Peridial cells verruculose. 

 3. Peridium losing tubular form becoming lacerate or spreading. 

 5. Peridial cells rugose. 



6. Peridia elongated (1.5-4 mm high) . 



7. Aeciospores small (15-19 X 18-25 /x), wall 1.5-2 fi. 



7. Aeciospores mediunpsized (15-26 X 18-32 ll), wall 2- 

 6. Peridia elongated (2-5 or 6 mm or more). 



8. Aeciospores very large (28-35 X 30-45 /a), wall 3-5 fi. 

 8. Aeciospores small (18-24 X 24-27 [ x), wall 1.5-2.5 p. 



5. Peridial cells verrucose. 



On Vauquelinia 



3.5 /a. 



libocedri. 

 nootkatense. 



cornutum. 

 miyabei. 

 nipponicum. 



globosum. 

 nidus-avis. 



tremelloides. 

 torminali-juniperinum. 

 turkestanicum. 



vauqueliniae. 



