40 BOTANICAL GAZETTE (yoLy 
Ravenelia subtortuosae, sp. nov. 
o. Pycnia; none found in material at hand. 
I. Aecia caulicolous, thickly scattered over hypertrophied 
areas which form open witches’ brooms 1-2 cm. across. Aecia 
o.2-0.3 mm. in diameter by o.8-1.2 mm. high, cylindrical, sub- 
epidermal, peridium erect, margin erose and gradually weathering 
away to base, cells irregularly oblong to polygonal in face view, 
not overlapping, outer walls 5-6 uw thick, verrucose, inner ones 
2-3 » thick, verrucose, both walls appearing as if reticulate in 
certain views, side walls 2-3 u thick, transversely striate; aeciospores 
irregularly oval to subglobose, angular, 13-18 18-23 pw, average 
for ten spores 17X19.6 yu, walls cinnamon brown, 2-3 p thick, 
minutely verrucose. 
II. Uredinia amphigenous, very small, less than o.3 mm. 
across, rather firm, punctiform, subepidermal, ruptured epidermis 
inconspicuous; urediniospores obovate, subpyriform to oval, 
15-22 X 22-30 p, average for twenty spores 17.325.7 », chestnut 
brown, concolorous, or sometimes slightly darker at apex, walls 
1.5-2m thick, uniform, verrucose, germ pores six, equatorial; 
paraphyses very abundant, often constituting one-third to one- 
half of sorus, hyphoid, incurved, chocolate brown, dense, encircling 
the sorus, 10-13X40-50 mu, average for ten 10.3X43.6mu, an 
occasional paraphysis clavate, nearly colorless and with a solid 
stipe. 
III. Telia amphigenous, oval, o.5-1 mm. across, chestnut 
brown, subepidermal, ruptured epidermis inconspicuous, early 
naked; paraphyses none; teliospore heads light brown, hemi- 
spherical to ovoid, very irregular in shape and size, 33-100 p, 
average for forty heads 52.5 uw, 3-6 spores across, marginal spores 
3-16, inner spores o-12, spores in head 3-32, usual number 14-25, 
smooth, outer spores 1-celled, inner ones 2-celled; cysts small, 
hyaline, subappressed, ovoid, as many as the marginal spores, 
cohering at sides to each other but not to stipe, swelling and bursting 
in water; pedicel hyaline, compound, deciduous, short, 32-55 » 
long. 
On osaceae. Type for aecia collected on Acacia subtoriuosa at 
Corpus Christi, Texas, May 25, 1918, by W. H. Long (no. 6506). Type for 
