292 BOTANICAL GAZETTE | APRIL 
_O, II, III present in life cycle; urediniospore wall 1.5-2.5 mu. 
BE TON ARS oe Mash Pe a eS ee eS ee wy Fr, insulana 
O, I, II, III present in life cycle; sae meine be I-I. 
es ese eM ee ee as OF: Bie: 
Occurring on Piptocarpha 
Teliospores 19-27 by 35-58 p.....-.-+.--- 28. P. Pinel 
Teliospores 27-34 by 45-Gop............--- 29. P. leptoderma 
~ Teliospores appreciably thickened above : 
Teliospores light brown; I and III known........... ee P. Le Tesiut 
Teliospores colorless; I] and III known.............. . P. hyalina 
Teliospores dark cinnamon or chestnut brown, thickened at apex, frequently 
obscurely verrucose-rugose 
Uredinia unknown; spre chestnut brown, narrowed below 
Teliospores 0-45 BY 20-S0M. oes ee ee 11. P. vernoniphila 
Teliospores 15-17 by snide (iaicre-form).. .... «+; 960 Fs paupercula 
Uredinia present; teliospores dark cinnamon or  chestndt brown, rounded 
low 
a. wall cinnamon brown 
iniospore pores 4—6, scattered................. 12. P. fuscella 
Utedinioepore pores 2-3, approximately aang 
. P. Vernoniae 
e MS i we ee 8s . P. Lorentzii 
Urediniospore wall colorless to ‘aint golden brown 15. P. ‘semiinsculpia 
Teliospore wall prominently roughened 
Uredinia with encircling paraphyses; teliospore markings rama” a : . 
6 rata 
Uredinia without paraphyses 
Teliospore markings verrucose or echinulate-verrucose 
Uredinia or urediniospores present in life cycle 
Markings of teliospore prominent and closely placed 
Urediniospores ellipsoid to obovoid, 18-21 by 23-28 p....- +--+ °° °° 
Suis Lee ee eee 17. P. idonea 
Urediniospores globoid to obovoid, 22-26 by 26-32. .18. P. notha 
Markings prominent, sparsely distributed 
Urediniospore wall golden brown, thick; sori subepidermal 
10. FP; egregia 
Urediniospore wall colorless, thin; sori deep seated. .20. P. praealta 
Uredinia and urediniospores unknown (micro-form)..27. P. elephantopodis 
Teliospore markings rugose or verrucose-rugose 
Telia gregarious or confluent (micro- or lepto-forms) 
eliospores not or slightly constricted 21. P. rotundata 
Teliospores strongly constricted................--- 22. P. discreta 
Telia scattered; urediniospores present (hemi- or brachy-forms) 
Teliospores averaging under gop in length........ 23. P. inaequaia 
ve ee te et a ee 
