Comprehensive Description

provided by North American Flora
Cronartium comandrae Peck, Bot. Gaz. 4: 128. 1879
Cronartiwn asclepiadeum Thesii Berk. Lond. Jour. Bot. 4: 311. 1845, Caeoma Comandrae Peck, Bull, Torrey Club 11 : 50. 1884. Cronartium Thesii Lagerh. Tromstp Mus. Aarsh. 17 : 94. 1895.
O and I. Pycnia and aecia unknown.
Uredinia hypophyllous and caulicolous, thickiy scattered or somewhat gregarious, round, pustular, small, 0.1-0.2 mm. across, dehiscent by a small central opening ; peridium delicate, inner walls somewhat thicker than outer walls ; urediniospores globoid, 20-23 by 22-28 fi ; wall nearly colorless, rather thin, 1.5-2 /u, sparsely and minutely echinulate.
Telial columns hypophyllous and caulicolous, cylindrical, 90-110 p thick, about 1 mm. long; teliospores oblong or cylindrical, 12-15 by 32-44^, obtuse or truncate at both ends ; wall nearly colorless, smooth, rather thick, 2-3 «.
On Santalaceae :
Comandr a pallida A. DC, Colorado, Iowa, Montana, Nebraska, South Dakota, Washington,
Wyoming ; Assiniboia, British Columbia. Comandra umbellala (L,.) Nutt. {Thesium wmbellatum L,.), California, Illinois, Iowa, Massachusetts, Michigan, New Jersey, New York, Ohio ; Ontario. Type locality: Colorado, on Comandra pallida.
Distribution : Northern United States and Canada from ocean to ocean.
bibliographic citation
Joseph Charles Arthur. 1907. UREDINALES; COLEOSPORIACEAE, UREDINACEAE, AECIDIACEAE (pars). North American flora. vol 7(2). New York Botanical Garden, New York, NY
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