1963] 



LISTS AND KEYS OF THE CEDAR RUSTS OF THE WORLD 



317 



Hosts Harboring Telial Phase 



On Chamaecyparis 



1. Telia foliicolous, without hypertrophy, teliospores 2-celled. 



2. Teliospores with medium cinnamon-brown walls, thicker above, 3-5 y.. 



2. Teliospores with thin, lemon-yellow walls, uniform, 1—1.5 fi. 

 1. Telia caulicolous, causing more or less hypertrophy. 



3. Enlargements of stems slight or gradually fusiform. 

 4. Telia pulvinate, teliospores 2-celled. 



4. Telia hemispheric, teliospores 2-4-celled. 

 4. Telia terete, slender, teliospores 2-5-celled. 

 3. Enlargements irregular, knotty, teliospores 1-3-celled. 

 1. Telia often causing fasciation of the branches. 



fraternum. 

 nootkatense. 



hyalin u m. 

 biseptatum, 

 ellisii. 

 miyabei. 

 ellisii. 



On Cupressus 



1. Telia caulicolous, on smaller branches only, with little hypertrophy. 



2. Teliospores with 1-2 pores in each cell, near the septum. 



2. Teliospores with 4-6 or more pores, in one transverse zone near 

 in two zones, those near apex or base only two in number. 

 1. Telia caulicolous, on smaller branches, with fusiform swellings. 



cun nvnghamtan ion. 

 the septum or 



taianum. 

 min us. 



Telia caulicolous, extending to larger branches and main trunk, with hypertrophy. 

 3. Swellings fusiform to subglobose galls, telia becoming tongue-shaped and ir- 

 regular, teliospores 2-celled, 16—27 X 30-60 y. cupressi. 

 3. Swellings at first rotund galls, later fusiform swellings, telia pulvinate, telio- 



spores 2-celled. 24-28 x 48-60 y. 

 3. Swellings fusoid, on brandies of 

 spores 1-celled, 24-31 X 34-59 y. 



telia 



meridissimu m. 

 various ages, telia laterally compressed, telio- 



tsingchensis. 



On Juniperus sect. Oxycedrus 



1. Telia foliicolous, or on green stem, not causing hypertrophy of the stem. 



torminali-j u nipe r i n u m . 



davisii. 

 shiraian u m. 



corn utum. 

 corniforme. 

 gracile. 



clavipes. 



2. Telia hemispheric or depressed-globose. 



3. Teliospores with hyaline papillae over the pores. 

 4. Teliospores 35-49 y long, papillae noticeable. 



4. Teliospores 40-55 y long, papillae large. 

 3. Teliospores without hyaline papillae. 



2. Telia pulvinate or applanate. 



5. Teliospores with hyaline papillae. 



5. Teliospores without hyaline papillae, 

 i. Telia caulicolous, causing witches' brooms. 

 1. Telia on twigs or branches, causing more or less hypertrophy. 



6. Telia hemispheric, teliospores with carotiform pedicels. 

 6. Telia applanate or pulvinate, teliospores with terete pedicels. 

 7. Telia on smaller branches with slight hypertrophy. 



8. Teliospores with hyaline papillae. cornutum 

 8. Teliospores without hyaline papillae. amelaneliieris 

 7. Telia on larger branches with hemispheric or gall-like swellings. tremelloides 



6. Telia terete. clavariiforme 

 6. Telia conic or laterally compressed, liigher than wide. confusum or fuscum 



1. Telia unknown; uredia present, teliospores intermixed, teliospores 2-celled. gaeumanni 



On Juniperus sect. Sabina 



1. Telia foliicolous, or on green stems, without hypertrophy. 

 2. Telia causing fasciation of branches (witches' brooms). 



3. Telia hemispheric, teliospores medium-sized (37-52 y long). 



3. Telia bluntly conical, teliospores large (45-74 y long). 

 2. Telia not causing fasciation of branches (or slight). 



4. Telia arising between the leaves. 



5. Pedicels of teliospores carotiform. 

 5. Pedicels of teliospores terete. 



6. Pores 2 in each cell near septum, or only one in upper cell. 

 7. Teliospores subglobose (25-30 X 30-35 y). 



n id us-avis. 

 kemianum. 



inconspicuum. 



hemisphericum. 



