Part 3, 1912] AECIDIACBAE 



189 



Pendium dehiscent with longitudinal slits along the sides. 



111\a^^] "^^1^1^ siibspinulose. 11. G. irachysorum. 



pil;^- 1 ""^ ^ verrucosa 29. G, corniculans. 



pf /^- 1 y^^ verrucose-rugose. 9. G . juvenescens . 



Per dial ce s rugose. 12. G.tubulatum. 



Ppr.M4^t 1 ^^ cells smooth. 13. q^ Botryapites. 

 ii'eridium losing tubular form by becoming lacerate or fimbriate. 

 Jr'eridium spreading or more or less erect after dehiscence. 

 Peridial cells rough. 



Peridial cells lanceolate in face view (not often seen 

 m side view). 



Aeciospore-wall cinnamon-brown, very thick 



. (^r^-")- 14. G. Nidus-avis. 



Aeciosp ore -wall pale cinnamon-brown, moderately 

 thick (2-2.5^). 17. G.exierum. 



Peridial cells rhomboidal in side view (not often seen 

 in face view). 



Peridial cells verrucose ; aeciospores large (21-39 ^) , 



the wall yellowish. 15. G.germinale. 



Pendial cells rugose. 



Aeciospores small (18-23^), the wall cinnamon- 

 brown. 21. GJaponicum. 

 Aeciospores very large (28-45 ^), the wall chest- 

 . . nut-brown. 18. G.juniperinum. 

 Peridial cells linear-rhomb oidal or linear in side view. 

 Peridial cells verrucose. 



Aeciospores small (18-22 ^) , the wall rather thick 



(1.5-2.5/^). 22. G. transformans . 



Aeciospores rather large (21-30 //), the wall thick 



(2.5-3.5/^). 23. G. clavariae/orme . 



Peridial cells rugose. 



Aeciospores moderately large (18-30//), the wall 



rather thick (2.5-3.//). 25. G. Betheli. 



Aeciospores medium-sized (15-25//), the wall 

 rather thin (1.5-2//). 26. G. globosum. 



Peridial cells smooth. 27. G. hyalinum. 



Peridium strongly revolute after dehiscence. 



Peridial cells somewhat curved when wet ; side walls 



closely rugose nearly to outer side. 30. G . Jlori/orme . 



Peridial cells strongly curved when wet ; side walls rather 

 sparsely rugose on inner half. 31. G . Juniperi-virginianae , 



Autoecious ; aecia inhabiting family Juniperaceae, and appearing on 

 galls like the telia ; peridium soon lacerate, peridial cells rugose. 32. G. bermudianum. 



Telia present and exclusively considered. 



Telia appearing on the leaves or leafy twigs, not causing material hypertrophy or distortion. 

 Telia pulvinate, low. 



Teliospores 2-5-celled ; pedicels terete. 1. G. Blasdaleanum. 



Teliospores 2-celled. 



Pedicels of teliospores terete. 3. G.fraternum. 



Pedicels of teliospores carotiform. 4. G. i?iconspicuum . 



Telia musciform, light chestnut-brown. 6. G. multiporum. 



Telia tongue-shaped, chestnut-brown. 7. G. exiguum. 



Telia hemispherical, chocolate-brown. 



Teliospores with large hyaline papillae over the germ-pores, 8. G. Davisii. 



Teliospores with small hyaline papillae over the germ-pores. 16. G. cornutum. 

 Telia causing fasciation of the branches, or witches' brooms. 

 Telia appearing only on the leafy twigs. 



Teliospores small (39-52// long). 9. G.juvenescens. 



Teliospores large (55-74// long). 10. G.Kermanum. 



Telia appearing only on the woody twigs and branches. 



Telia hemispherical ; spores 2-celled. 14. G. Nidus-avts. 



Telia terete ; spores 2-5-celled. 24. G. Elhsit. 



Telia appearing on twigs or branches, causing more or less 



Enla?gementrabruptly fusiform, short, telia wedge-shaped. 11. G. Irachysorum. 

 Enlargements gradually fusiform, long. 



Telia hemispherical. ^_ ^ „ , ... 



Teliospores 2^-celled ; pedicels terete. 13. G. Botryapites. 



Teliospores 2-celled. Arv ,. ^„.v 



Pedicels of teliospores terete. 14. G. Ntdus-avts. 



Pedicels of teliospores carotiform. 15. tr- germinate. 



Telia applanate or pulvinate, usually large and somewhat 



TeHospoTes 'with hyaline papillae over the germ-pores. 16. G. cornutum. 



Teliospores without hyaline papillae over the germ-pores. ,^/^^„„, 



Teliospores rather small (32-42 // long). 17- G. ^.fJ^T^l^' 



Teliospores rather large (42-61// long). 18. G.jumpennum. 



