282 NORTH AMERICAN FLORA [VoLUME 7 
I. Aecia usually hypophyllous, in crowded, circular groups, 2-4 mm. across, cupulate or 
short-cylindric, small, 0.2-0.3 mm. broad, 0.5-1 mm. high; peridium pale-yellow or colorless, 
more or less recurved and split into coarse segments; peridial cells thomboidal, 15-23 by 27-37 p, 
somewhat overlapping, the outer wall 6-124 thick, finely striate, smooth, the inner wall 
thinner, 2-5 », conspicuously and evenly vetrucose; aeciospores globoid, 16-21 by 19-24 p; 
wall pale-yellow or colorless, rather thin, 1-2 n, finely verrucose. 
On SANTALACEAE: 
Comandra pallida A. DC., Colorado, Iowa, Kansas, Nebraska, North Dakota. 
Comandra umbellata (L.) Nutt., Ilinois, Indiana, Iowa, Kansas, Massachusetts, New 
York, Ohio, Wisconsin; Ontario. 
On ScROPHULARIACEAE! 
Aureolaria flava (L.) Farwell (Gerardia flava 1,., G. quercifolia Pursh, G. virginica Britton 
in part, Dasistoma virginica Britton in part), New Jersey, North Carolina. 
Aureolaria microcarpa Pennell, Alabama. 
Aureolaria virginica (L.) Pennell (A. villosa Raf., Dasistoma pubescens Benth., D. flava 
Wood in part, Rhinanthus virginicus 1,.), Connecticut, Michigan, North Carolina. 
Castilleja coccinea (L,.) Spreng., Iowa. 
Castilleja foliolosa H. & A., California. 
Castilleja integra A. Gray, Colorado. 
Castilleja sessiliflora Pursh, Colorado, Iowa, Nebraska, South Dakota, Wisconsin. 
Castilleja sulphurea Rydb., New Mexico. 
Chelone glabra 1,., Connecticut, Massachusetts, New Jersey, New York. 
Dasisitoma macrophylla (Nutt.) Raf. (Seymeria macrophylla Nutt., Afzelia macrophylla 
Kuntze), Nebraska, 
Melampyrum lineare Lam. (M. americanum Michx.), Connecticut, Delaware, Massachu- 
setts, New Jersey. 
Penstemon albidus Nutt., Kansas, South Dakota. 
Penstemon alpinus Torr., Colorado, Wyoming. 
Penstemon ambiguus Torr., Colorado. 
Penstemon angustifolius Nutt. (P. coeruleus Nutt.), Kansas, Nebraska. 
Penstemon australis Small, Alabama, Mississippi, North Carolina, South Carolina. 
Penstemon canescens Britton, Virginia. 
Pensitemon Digitalis Nutt., Kansas. 
Penstemon fruticosus (Pursh) Greene, Wyoming. 
Penstemon glabey Pursh, South Dakota. 
Penstemon gracilis Nutt., Iowa, South Dakota, Wisconsin. 
Penstemon grandiflorus Nutt., lowa, Kansas, Nebraska, South Dakota. 
Penstemon hirsutus (1,.) Willd. (P. pubescens Soland.), Indiana, New York, Pennsylvania. 
Penstemon Jamesti Benth., Oklahoma. 
Penstemon Mensziesit Hook., California. 
Penstemon pallidus Small, Illinois, Missouri. 
Penstemon Pentstemon (L.) Britton (P. laevigatus Soland.), Indiana, South Carolina, Virginia. 
Penstemon secundiflorus Benth., Colorado. 
Penstemon tenuiflorus Pennell, Oklahoma. 
Penstemon Torreyi Benth., New Mexico. 
Penstemon unilateralis Rydb., Colorado. 
Penstemon virens Pennell, Colorado. 
Penstemon virgatus A. Gray, Arizona. 
II. Uredinia chiefly hypophyllous, scattered, early naked, broadly elliptic, small, about 
0.3 mm. long, pulverulent, dark cinnamon-brown, ruptured epidermis usually evident; uredin- 
iospores globoid, 19-26 by 20-284; wall golden- to cinnamon-brown, moderately thin, 
1.5-2 », evenly and finely echinulate, the pores variable, when 3—4, either approximately 
equatorial or 3 basal and 1 above, when 4-6, scattered. 
III. Telia chiefly hypophyllous, scattered, oblong or linear, small, 0.3-1.5 mm. long, 
early naked, pulvinate, blackish-brown, ruptured epidermis usually evident; teliospores 
obovoid or ellipsoid, 15-21 by 29-48 y, rounded or obtuse above, somewhat narrowed below, 
slightly constricted at septum; wall chestnut-brown, 1.5-2 thick, somewhat darker and 
thicker at apex, 5—9 u; pedicel concolorous with base of spore, as long as spore. 
The species consists of two well fixed races separable by the aecial host-families and also 
by slight morphological differences. The aeciospores from species of Santalaceae are slightly 
smaller and thinner-walled than those from species of Scrophulariaceae. Urediniospores of 
the Santalaceous race are slightly larger and have 4-6 scattered pores, while those of the other 
race are slightly smaller and usually have 3 or 4 pores, either scattered, equatorial, or partly 
basal. 
ON POACEAE: 
Andropogon condensatus H.B.K. (Schizachyrium condensatum Nees), Guatemala. 
Andropogon furcatus Muhl. (A. provincialis furcatus Hack. A. provincialis Am. Auth. not 
Lam.), Alabama, Colorado, Illinois, Indiana, Iowa, Kansas, Minnesota, Mississippi, 
Missouri, Nebraska, New York, North Dakota, Oklahoma, South Dakota, Texas, West 
Virginia, Wisconsin; Ontario. 
