14 



Mycologia 



II. Uredinia at first (primary) amphigenous, interspersed 

 with the pycnia in circular groups 2-4 mm. across on somewhat 

 larger discolored spots, afterward (secondary) hypophyllous, scat- 

 tered, minute, 0.1-0.2 mm. in diameter, soon naked, pulverulent, 

 chestnut-brown; paraphyses few or wanting; urediniospores flat- 

 tened laterally, seen from flattened side globoid or somewhat obo- 

 void, 23-32 by 25-40 /x, seen from narrow side obovate, and appar- 

 ently acute above; wall with a hygroscopic layer, the inner layer 

 firm, cinnamon-brown, 3 it thick, the cuticle and subcuticular layers 

 colorless, verrucose-echinulate with close-set, blunt projections on 

 the flattened sides, becoming much longer on the narrowed sides 

 and, as the spores are ordinarily* seen, appearing like a coarse 

 fringe, 5 - 7/* wide, extending around the spore, the pores 2, dis- 

 tinct, one in center of each flattened side. 



III. Telia hypophyllous, in loose groups, at first bullate, soon 

 naked, somewhat pulverulent, chocolate-brown, ruptured cuticle 

 noticeable; teliospores ellipsoid, 21-24 by 2 5~34/ x > rounded above 

 and below, slightly constricted at septum; wall dark chestnut- 

 brown, uniformly 2-3^ thick, sparingly and evenly verrucose; 

 pedicel colorless, as long as spore, slender, tapering downward, the 

 appendages obsolete. 



On Tabebuia sp. (Bignoniaceae), Las Lilas, March 24-28, O, II, 

 335° (tyP e ) ; Pointe Gourde, March 31, II, III, 3408; Forest, 

 Siparia Quarry, April 8, III, 3526; Lady Chancellor Road, March 

 14, II, iii, 3180. The group of species to which this new species 

 belongs is imperfectly understood. There are probably quite a 

 number of them, but at present the collections are frequently un- 

 named or listed under the genus Uredo or Puccinia, and have not 

 been brought together for comparative study. 



8. Uromyces affinis Wint. Hedwigia 24: 259. 1885 



On Hypoxis decumbens L., II, 3192, 3199, 3387. The aecia 

 and telia of this species were found in Missouri in 1883 by 

 Demetrio, the earliest collection of the rust known, but so few 

 urediniospores were present that they were not mentioned in the 

 original description. Since that time many collections showing- 

 abundance of uredinia have been taken in the eastern United 

 States, and recently the tropical collections, which show only 

 uredinia and are usually reported under the names Uredo Hy- 

 poxidis (Bres.) P. Henn. and Uredo globulosa Arth., have been 

 referred to the same species. 



