Macbride — North American Species of Amsinckia 3 
I have had the privilege of studying the specimens of Amsinckia 
belonging to the Rocky Mountain Herbarium of the University of 
Wyoming which collection proved to contain a number of valuable 
sheets not represented at the Gray Herbarium. In citing these I 
have indicated them by the abbreviation ‘‘ R. Mt. Herb.” It was 
also my good fortune during a brief visit at the Missouri Botanical 
Garden to have the opportunity of examining there the collection 
in this group a portion of which was loaned to me for further study. 
These specimens are indicated by the abbreviation ‘‘ Mo. Bot. 
Gard.” 
KEY TO THE SPECIES 
a. Nutlets at maturity smooth and B pweoi b. 
. Corolla about 10 mm. long; s dian. 
pe sto. 5 mm. tok ihenhy triquetrous; scar not 
Nutlets 5 pee long or longer, not at all triquetrous; 
or lineny. DIOMUNODS 25. oc 5 oo ss os ey oi . A. carinata. 
b. Corolla 12-15 mm. long; scar of nutlet nearly median 
3. A. spectabilis. 
a. Nutlets more or less roughened, as or somewhat lustrous c. 
c. Nutlets crustaceous, tes: sellate or tessella e-rugose 
err 15-18 mm. peal ‘nutlets scarcely 3 caer 
ong and scarcely rugose..........;...-...... . A. Lemmonii. 
Corolla about a mm. lone va 3.5-4 mm. es 
OF fO88 THROBE ee tee oe 5. A. tessellata. 
tae agree s variously ‘oughe fhe but never tessellate nor 
llate- 
d. Lieven distinctly desitinitabe, often more or less re- 
pand; coastal species somewhat decumbent at base, 
or sometimes procumben 
é. dhe ray Rites with flattish. back, faintly rugulose 
CRRA eke ee ees 6. A. lycopsoides, 
é. Nutlets ovate-trigonous, ee ro fa se : 2 
acemes bracteate thr agit ars ar gy wae! he A. St. Nicolai. 
ebractea 
bracted; pontinental | eos: 
g. Sepals bearde don the earaina with long white 
Cae ac eis i ties oa eae oe 8. A. barbata. 
g. Sepals Ab sonia on the margins with long 
h. ae a black or dark brown, 1-1.5 
ulate ort muri- 
cats: vo Sct msl rik veka 9. A. intermedia. 
h. Mature ge te usually ey in color, over 
2 mm. long, muriculate and more or 
less is distinedl rugulose. 
Corolla-limb g; nutlets eer 
OD pea CURE: ane 17. A. Douglasiana. 
Corolla nearly tubular, the limb narrow; 
nutlets usually with strongly wate 
rugae . A. Menziesii. 
