400 Vermischte neue Diagnosen. 
It grows in places thoroughly exposed to the sun, preferably high 
hills. Its flowering time is June, and it is common in central North 
Dakota. 
672. Corispermum simplicissimum J. Lunell, l. c., p. 207. — Planta 
annua, gracilis, erecta, simplex usque ad inflorescentiam, parte media e 
tribus valde foliosa, foliis partis inferioris e tribus probabiliter palles- 
centibus et caducis. Planta tota, imprimis pars ejusdem superior, pu- 
bescens etiam aetate, circa 3 dm alta altiorve, in inflorescentiam multi- 
plicem  terminans, unius spicae longae terminalis, et 1—7 spicarum 
breviter pedunculatarum, vel aliquando subsessilium, angustartum, diver- 
gentium, in supremis foliis axilarium. Folia anguste linearia, cuspidata, 
2—4 cm longa, 1 mm lata vel minus, pubescentia. Bracteae 2—12 mm 
longae, 1--1,2 mm latae, subulatae, margine scariosae, tam latae vel 
latiores quam utriculum, terminalis 3—7 cm longa et iis minus angustata. 
Bracteae per terminalis 3—7 cm longa et iis minus angustatae. Bracteae 
per totam inflorescentiam plus minusve densae. Achenia alata singulis 
vel ambobus lateribus, 2,5 mm longa, 1 mm lata ovalia et bractea sub- 
tendente cooperta. — The predominant feature of this species is its 
peculiar aspect, the stem being simple throughout to the top with its 
short peduncled spikes in the upper axils. Its nearest relative, C. nitidum 
Kit, is bushy-branched throughout; its leaves are narrowly linear and 
seldom more than 2 cm long; its bracts are not imbricated and are 
narrower than the utricle, which is 2 mm long and 1 mm wide and 
winged, and the plant is almost glabrous. — C. hyssopifolium L. is 
profusely branched throughout, its leaves up to 6 cm long and 4 mm 
wide: its bracts are imbricated and its utricle is 3,5—5 mm long, winged. 
— I have made out the characters of both of these species from Euro- 
pean specimens in my herbarium. All the three aforesaid species are 
floriferous at the top only. Four other North American species belong- 
ing to the west, differ in being floriferous nearly to the base, and 
divarieately branched below. Two of these, moreover, have a wingless 
utricle. — The type specimen of C. simplicissimum is registered as 
no. 112 in my private herbarium. The plant was collected by me 
Aug. 26, 1890, on the shore of a lake several miles south-east of Barton, 
Pierce Co., North Dakota, as yet the only locality from which it is 
known to me. 
673. Thalictrum thyrsoideum E. L. Greene in Midland Nat, I, 1909, 
p. 102. — Planta inter affines humiles, 2—3 dm alta, caule simplici 
rigidiusculo, leviter anguloso-striato, sparse folioso, in inflorescentiam 
nudam subconfertam et thyrsiformem terminante. Folia plerumque 3, 
non ampla, breviter petiolata; foliola firmiter membranacea, parvula, 
11--13 mm lata, suborbicularia aut interdum late subcuneato-obovata, 
supra medium 3-loba, lobis 2—3-crenatis, supra glauco-viridia, subtus 
glauca, utrinque minutim reticulato-venulosa. Sepala maris late ovalia, 
obtusa, albicantia vel interdum purpurascentia. Sepala feminei iis maris 
dimidio minora, magis herbacea. Antherae lineari-oblongae, acuminatae. 
— eg 
