Part 6, 1921] AECIDIACEAE 409 
II. Uredinia chiefly hypophyllous, scattered, round, small, 0.1-0.3 mm. across, soon naked, 
dark cinnamon-brown, pulverulent, ruptured epidermis inconspicuous; urediniospores globoid, 
19-23 » in diameter; wall cinnamon-brown, thin, 1-1.5 y, finely echinulate, the pores very 
indistinct, 2 sometimes 3, in the equator. : 
III. Telia hypophyllous, scattered, round, small, 0.1-0.3 mm. across, early naked, pulvi- 
nate, white, ruptured epidermis inconspicuous; teliospores oblong, 16-22 by 30-35 u, obtuse or 
rounded at both ends, slightly constricted at septum; wall colorless, smooth, uniformly thin, 
about 1 y; pedicel colorless, terete, delicate, one half to once length of spore. 
On LaMiaceak: 
Hyptis atrorubens Poir. (Mesosphaerum atrorubens Kuntze), Porto Rico. 
Hyptis pectinata (L.) Poir. (Mesosphaerum pectinatum Kuntze), Costa Rica; Guatemala; 
Cuba; Jamaica; Porto Rico. : ‘ 
Hyptis polystachya H.B.K., Costa Rica; Guatemala. 
Hyptis suaveolens (L.) Poir. (Mesosphaerum suaveolens Kuntze), Costa Rica; Cuba; Jamaica: 
Porto Rico. 
TYPE LocALITy: Medellin, Columbia, on Hyptis pectinata. 
Distripution: Central America and the West Indies; also in South America. 
ILLUSTRATION: Mém. Soc, Neuch. Sei. Nat. 5: f. 28. 
209. Dicaeoma fidele Arthur. 
Puccinia fidelis Arth. Bull. Torrey Club 38: 369. 1911. 
Eriosporangium fidelis Arth. N. Am. Flora 7: 212. 1912. 
OQ. Pycnia hypophyllous, grouped among the aecia, prominent, punctiform, in section 
imperfectly flask-shaped with shallow base, large, 112-144 4 broad by 65 w high; protruding 
conoidal mass of ostiolar filaments 60-90 » high. 
I. Aecia hypophyllous and caulicolous, abundant, scattered over the whole plant from a 
diffused mycelium, causing some hypertrophy and etiolation, chiefly seated ‘on the woody 
tissues and hence often in rows along the veins, bullate, mostly oval, large, 0.8—1.3 mm. across, 
somewhat tardily dehiscent by irregular slits, orange-colored fading to dirty-white, overarching 
epidermis reddish and prominent; peridium wanting; aeciospores globoid, 20-24 by 23-30 pn, 
mostly 23-26» in diameter; wall nearly or quite colorless, appearing very thick, 2.5-3 yu, 
coarsely and closely verrucose. 
II. Uredinia hypophyllous, scattered, round, small, 0.1-0.2 mm. across, soon naked, 
dark cinnamon-brown, pulverulent, ruptured epidermis inconspicuous; urediniospores globoid, 
21-24 by 23-26 wu, usually 23-25 w in diameter; wall cinnamon-brown, rather thin, 1-1.5 y, 
finely and abundantly echinulate, the pores usually inconspicuous, generally 4 near the hilum. 
III. Telia hypophyllous, scattered, round, small, 0.1-0.2 mm. across, early naked, pulvi- 
nate, very pale-brownish, cinereous by germination, ruptured epidermis inconspicuous; teli- 
ospores oblanceolate or fusiform, 17-19 by 50-67 u, narrowed or obtuse at both ends, some- 
what constricted at septum, the upper cell usually shorter, and somewhat inverted topshaped; 
wall nearly or quite colorless, uniformly thin, 1 » or less, smooth; pedicel nearly or quite color- 
less, terete, delicate, short, fragile. 
On LAMIACEAE: oe . 
Hyptis lilacina Schiede & Deppe (Mesosphaerum lilacinum Kuntze), Costa Rica; Guatemala. 
Hyptis pectinata (L.) Poir. (Mesosphaerum pectinatum Kuntze), Guatemala. 
Hyptis stellulata Benth. (Mesosphaerum stellulatum Kuntze), Jalisco. 
Hyptis urticoides H.B.K. (Mesosphaerum urticoides Kuntze), Guatemala. 
Type LocaLiry: Hills near Guadalajara, Mexico, on Hyptis stellulata. 
DIsTRIBUTION: Central Mexico and Central America. 
210. Dicaeoma insititium Arthur. 
Puccinia insititia Arth. Mycologia 7: 248. 1915. 
O and I. Pyenia and aecia unknown. 
II. Uredinia hypophyllous, scattered, round, 0.3-0.6 mm. across, rather early naked, 
ruptured epidermis evident, often white and appearing peridioid; urediniospores globoid or 
broadly ellipsoid, 20-25 by 23-29 py; wall dark cinnamon-brown, thin, 1-1.5 », closely and 
finely echinulate, the pores 3, equatorial, often indistinct. 
III. Telia not seen; teliospores in the uredinia, narrowly ellipsoid, 16-24 by 48-55 y, 
rounded or obtuse above, rounded or narrowed below, slightly or not constricted at septum; 
wall colorless, thin, 1 » or less, smooth; pedicel colorless, delicate, about half length of spore. 
