PENNELL—SCROPHULARIACEAE OF THE ROCKY MOUNTAINS. 327 
Corolla nearly tubular, the posterior lobes projecting; seeds uni- 
formly dense, very dark, 1.5 to 2 mm. long; stems lower, diffuse- 
spreading partially or throughout, forming mats; plants more 
or less puberulent...........0...2. 205 cece eeeee XV. Caespitosi. 
Corolla 25 to 30 mm. long, lavender-blue or chocolate-purple, lanose 
within over bases of the strongly projecting anterior lobes. 
XVI. Whippleani 
Anther sacs densely comose; seeds slightly wing-angled; corolla throat strongly 
flattened anteriorly and ridged within; inflorescence by reduction seemingly 
racemose; leaves coriaceous; plants shrubby, woody below. DASANTHERA 
(Raf.) Pennell). ... 2... eee cece ee eee XVII. Fruticosi. 
Anther sacs opening partially by short confluent proximal slits, the anthers horse- 
shoe-shaped; seeds pale gray, minutely honeycombed. Plants shrubby at 
base; corolla widely inflated, glabrous without and within; sterile filament 
glabrous. SAccANTHERA Benth. 
Corolla scarlet-red, the throat nearly tubular, deeply 2-lipped, the posterior lobe 
projecting, the anterior ones strongly descending-recurved. 
XVIII. Bridgesiani. 
Corolla violet or blue, the throat inflated, shallowly 2-lipped, the lobes all spreading. 
XIX. Heterophylii. 
I, CENTRANTHIFOLII, 
Stem glabrous; leaves glabrous or nearly so; sepals triangular-ovate, acute to acumi- 
nate, 3 to 5 mm. long......2.. 2. eee eee eee eee eee eee 1. P. eatoni. 
Stem and leaves finely pubescent or puberulent; sepals triangular-ovate to lanceolate, 
acute or more frequently long-acuminate, 3 to 7 mm. long. 
la. P. eatoni undosus. 
II. BARBATI. 
Anther sacs not lanate, more spreading; corolla throat relatively broad. 
Corolla within the throat glabrous anteriorly or with a few white hairs; sepals mostly 
3 to 5 mm. long... 2.2.2.2... ee ce eee ce ee ce ce ee eee eee ee eees 2. P. torreyi. 
Corolla within throat lanate anteriorly with yellow hairs; sepals mostly 5 to 9 mm. 
long. 
Stem and leaves glabrous; stem leave stineaz or nearly so....... 3. P. barbatus. 
Stem and leaves puberulent; stem leaves broader than linear. 
3a. P. barbatus puberulus. 
Anther sacs more or less lanate, slightly thicker and more erect; corolla throat narrow. 
4. P. trichander. 
III. UTAHENSES. 
A single species....... 00... cee eee cee cece ee cence cece cena tee 5. P. utahensis. 
IV. ALBIDI. 
A single species........... 2... e eee eee eee eee eee ee eee eee en aces 6. P. albidus. 
“Vv. FREMONTIANI. 
Plants 40 to 80 cm. tall; basal and lower leaves obovate, emarginate, the upper leaves 
oblong-ovate; calyx lobes broadly ovate, abruptly short-caudate, with relatively 
conspicuous, erose, scarious margins; corolla 23 to 25 mm. long; sterile filament 
nearly or quite glabrous.................2 0c eee cece eee neces 7. P. jonesii. 
1 Dasanthera Raf. Amer. Month, Mag. 2: 267. 1818. Type species, Gerardia fruticosa 
Pursh. 
