262 Rydberg : Studies on the 



grows along streams at an altitude of 2000-2200 m. The follow- 

 ing specimens from Montana belong here : 



Montana: Spanish Basin, 1897, Rydberg & Bessey, 48^6 

 (type in herb. N. Y. Bot. Garden); near Indian Creek, ^6*7.? / 

 Bridger Mountains, 487^ ; Mystic Lake, 1895, C. L. Shear, joyd ; 

 Deer Lodge County, 1901, Mrs. Eiiniia W. Se/uuber, 42 ; Basin, 



1902, Kilscy. 



Heliotropium spathulatum sp. no v. 



Hcliotropiujii eiirassai'ieitin Wook. Fl. Bor. Am. 2: 81. 1840. 



Not L. 



? Heliotropium curassavicum obovatiim DC. Prod. 9:538. 1 845. 

 Not H. obovahiin D. Don. 



A glabrous, more or less glaucous, fleshy perennial with as- 

 cending more or less branched stems, 3—5 dm. high : leaves spat- 

 ulate, fleshy, indistinctly nerved, 2-5 cm. long, obtuse or rounded 

 at the apex, tapering at the base and the lowermost petioled : inflor- 

 escence branched into 2—5 racemes ; these often starting from one 

 point at the end of the common peduncle : calyx about 3 mm. 

 long, cleft to the middle ; its lobes ovate-lanceolate, acute : corolla 

 white or slightly tinged with blue, 6-8 mm. long ; the limb of 

 about the same width : nutlets 2.5-3 '^n^- long, scarcely rugose. 



This is the common plant of the Rocky Mountain region that 

 has been known as H. curassaviciini L., but has much broader 

 leaves, more than twice as large flowers and larger fruit than the 

 cosmopolitan plant found on our eastern seaboard and in the south- 

 ern states. It is probably the same as the plant collected by 

 Douglas in the Blue Mountains of Oregon and briefly described 

 in the places cited above. Hooker states that in the Blue Moun- 

 tains were the only places where Douglas found H. ciirassavicnin. 

 In the Columbia herbarium there is a specimen, labelled : " Cali- 

 fornia, Douglas^ If this specimen is one of those collected in 

 the Blue Mountains and described by Hooker and DeCandoUe, 

 the synonyms cited above should be excluded ; for the specimens 

 evidently belong to the short-leaved and smaller-flowered form of 

 H. citrassavicuni common on the Pacific coast and described by 

 Willdenow under the name H. clienopodioidcs. 



H. spatludatnm is fairly common in meadows throughout the 

 Rocky Mountain region and the great plains from Assiniboia and 

 Washington to Iowa, New Mexico, Chihuahua and California. 

 The type was collected at Great Falls, Montana, 1890, R. S. 

 Williams, ^42 (in herb. N. Y. Bot. Garden). 



New York Botanical Garden. 



