260 Nelson : New Plants from Wyoming 



An abundant species on gravelly, open slopes in Yellowstone 

 Park. My no. 5553, June 28, 1809, near Golden Gate, is taken 

 as the type. It is probably the C. lanceolata of Tweedy* s Flora 

 of the Park in part only as C. Purs hit also occurs in the Park. 



'Claytonia aurea 



Related to the preceding : corms somewhat larger, deep set : 

 usually one root leaf present, rarely more, its petiole slender, nearly 

 twice as long as the narrowly oblong or oblanceolate blade : stem 

 leaves sessile by a narrowed base, linear-lanceolate, tapering grad- 

 ually to both ends, 2—4 cm. long : stems 1-5 from each tuber, 

 suberect, 1-2 dm. high, the paired leaves mostly below the middle 

 (inflorescence included) : peduncular part of the stem about equal- 

 ing the stem leaves as does the stem proper the root leaves : 

 the raceme many-flowered (7 or more), pedicels divaricate and 

 becoming more or less reflexed, about 2 cm. long : sepals rhom- 

 boidal or suboval, subscarious and finely veined : petals golden 

 yellow, 8-10 mm. long, broadly oval, abruptly narrowed into a 

 claw about one fourth as long as the blade. 



Yellow is anomalous not only in this genus but in this family, 



yet that it is a good Claytonia there can be no doubt. In the 



preceding species the xanthic tendency is shown in drying only 



while in this the yellow is most pronounced. The type specimens, 



no. 5488, were secured on low, wet flats near Henry's Lake, Idaho, 



June 22, 1899. 



J Oreobroma minima 



Root short conical or napiform, from 5 to 20 mm. long, the 

 leaves and scapes arising in a close cluster from the center of its 

 somewhat truncate summit : leaves few-several, narrowly linear, 

 4-7 cm. long, moderately fleshy: scapes rarely equaling the 

 leaves, mostly shorter, each with a small pair of bracts about % 

 its length from the base, geniculately and divergently flexed near 

 the single node : sepals sub-oval, abruptly acuminated into a short 

 tooth, sometimes with one or two smaller lateral teeth, no glandu- 

 losity : petals white : capsule large, approaching 1 cm. in length : 

 seeds smooth and shiny, 60-80 in each capsule. 



The nearest ally of this is probably 0. Grayi (Britton) Rydb., 

 from which it is at once separated by its very different root-cau- 

 dex, its slender leaves, its geniculate scapes, its glandless and not 

 erose sepals, its large, many-seeded capsule and white flowers. 



Collected on the wet grassy banks of a sub-alpine creek — a 



/■\ 



