Macbride — Revision of Mertensia 3 
Leaves (except sometimes the lower), wishogh distinct lateral 
veins, the middle cauline cig ly ov em. long; verna 
species, 0.5-3 (rarely 4) d igh, of | plains and foothills, 
or if aestival, alae c or ses and then possessing none 
of the other characters of POM Ee oe ots Li ec coe as tes as Group IT. 
_—— as long as or longer eg ie one exception i - -~ 
ongifoliae) and as broad as roader than 
rs; style usually longer Shi the corolla oe 
Coniiaen be rs pasha, the hairs scattered ape se 
surface or confined t ring; species of the 
Plains and Central Rocky Mountains end onkeat 
ubsect. LANCEOLATE. 
ire glabrous within; species essentially of the 
Northwest, mostly occurring north of Nevada - 
: WYOMING 650 bus iis Ok Subse . OBLONGIFOLIAE. 
Filaments narrower and much sh than th thers; 
short, little exceeding the calyx.................. , ae ALPINAE. 
Subsection PANICULATAE 
a. Pedicels and leaves pie the latter sometimes gla- 
rous on one su 
b. ria wine on pedicels more or less spreading and hispid 
haracter 
¢. Calyclohen lancelinear or lanceolate in anthesis, acu- 
: urring only north of latitude 40°. 
Leaves eee on r less a on both surfaces. 
Calyx-lobes in anthes mm. long; corolla- 
li on eS ps aks 1. M. paniculata. 
thesi 
t 10:ronk, broad. escpeenis la. var. longisepala. 
Leaves glab P WTIACes 6 ivi lb. var. subcordata. 
c. Calyx-lobes oblong-lanceolate in anthesis, merely acut- 
; occurring only south of latitude 40°. 
Leaves pubescent on bot BO ore es 2. M. toyabensis 
Leaves glabrous on the lower surface........... 2a. var. subnuda. 
b. — on pedicels rig | appressed, usually dense, 
nding to canescence 
rs i Sane broadly ovate, tia lower subcordate...... 3. M. platyphylla. 
€. _— fe cont seen or ovate-lanceolate, never subcor- 
d. Fruitin cels ose reflexed; corolla less than 
ing pediodl mee FEN eerie eee) ties ee 4. M. refracta, 
d. Fruiting peels ascending or nodding; corolla 10- 
é. Cayce otoets te, —_ or acuminate; cor- 
olla 13-16 mm. long, funnelform-campanu- 
late; leaves often pu nt beneath. 
Pedicels, and at least the upper -s 
mar y pu t; plant of the sake 
WE eg ee bet news ons 5. M. pratensis. 
Dadtsaat nod ] £ £, }, 
. hairs few yest minute; plant of the 
TUR Es os ra ess a. var. borealis. 
tubular-funnelform; leaves glab- 
é Citak nearly oblong, acutish; corolla ei 
mm. long, 
th be 6 Vib os OWES £4 eee 6. M. franciscana. 
rous 
