Vermischte neue Diagnosen. 245 
430. Ranunculus Purshii Richardson presents several variations, accord- 
ing to the following key: 
À. Leaves green, emersed. 
a) Terrestrial forms, growing in wet soil, forming a cluster of fibrous 
roots, stems ascending (or sometimes erect) 4—20 cm long. 
Var. 1 schizanthus Lunell, l. c., p. 6. 
Leaves divided into three lobes, and the lobes finely dissected. — 
North Dakota. 
Var. 2. dissectus Lunell, 1. c., p. 6. 
The lobes just as deeply cut, but the segments broader (as in Geranium 
dissectum L.). The prevalent land form. — North Dakota. 
Var. 3. geranioides Lunell, l. c., p. 6. 
The lobes not as deeply cleft, and the segments still broader than 
in var. dissectus (the leaf resembles in outline the leaf of Geranium 
molle L.) — North Dakota. 
b) Mud form. 
Var. 4 radicans Lunell, l. c., p. 6. 
Creeping, and rooting repeatedly from the nodes. Leaves mostly the 
form of var. geranioides. — North Dakota. 
B. Leaves green, emersed, and blackish, submersed. 
c) Aquatic form. 
° Var. 5 polymorphus Lunell, l. c., p. 6. 
The emersed leaves present forms 1, 2, and 3 just described. The 
submersed leaves are capillary multifid (filiform dissected). Stems elongated, 
sometimes several meters in length. — North Dakota. 
431. Roripa hispida (Desv.) Britton var. glabrata Lunell, l. c., p. 6. 
The whole plant shining, glabrous. Occasionally among the main 
form. — North Dakota. 
432. Cheiranthus cheiranthoides (L.) Heller var. prostratus Lunell, 1. c., p. 6. 
Stem creeping on the ground. — Found near Dunseith, Rolette Co., 
North Dakota. 
433. Aragallus Aven-Nelsoni Lunell, |. c., p. 6. 
Perennial, cespitose, 10—20 cm high, with the short and thick stems 
covered with faded old leaves and stipules. The stipules are imbricated, 
membranous, deltoid, acuminate, and thickly covered with long, white 
Silky hairs. The whole plant is bright-green. The leaves are 8—15 cm 
long, 4 to 7-pinnate, the leaflets 1—2 cm long, narrowly linear, straight 
or faleate, acuminate at both ends, pubescent, with partly appressed and 
partly spreading hairs, margins thickened. The plant never has more 
than 7 pairs of leaflets. A few leaves are different from the others, 
being 2—4 cm long, 3 to 4-pinnate, with leaflets 5 mm long, oblong to 
lanceolate. Buds densely silky-tomentose, at least when young. Calyx 
Silky incanous, with a shining, dark, bluish-violet shade, at the end of 
the flowering time inflated, covering the pod, at last getting cracked by 
the ripe pod. Bracts triangular, subulate-tipped, green, silky, unequal in 
length. Flowers rose-purple (in drying changed. to deep blue), or seldom 
