298 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
60. PARNASSIACEAE. Flower-of-Parnassus Family. 
1. PARNASSIA L. FLower-or-Parnassvus. 
Glabrous perennial herbs with short rootstocks and scapiform stems; leaves entire, 
mostly basal and petioled, the single cauline leaf sessile; flowers solitary, terminating 
the scape; sepals 5, green; petals 5, white, conspicuously veined; stamens 5, alternate 
with the petals and with the 5 clusters of gland-bearing staminodia; capsule 1-celled, 
with 3 or 4 valves; seeds numerous, winged, 
KEY TO THE SPECIES, 
Petals fimbriate on the sides near the base.............-........... 1. P. fimbriata, 
Petals entire... 2.2.2.0... 2.2 eee cee cece cece eee eee 2. P. parviflora, 
1. Parnassia fimbriata Kénig, Ann. Bot. Kén. & Sims 1: 391. 1805, 
Type Locauity: ‘On the coast of northwest America,’’ 
Ranae: Alaska and Alberta to California and northern New Mexico. 
New Mexico: Truchas Peak (Standley 4768). _ Wet ground, in the Arctic-Alpine 
Zone. 
2. Parnassia parviflora DC, Prodr. 1: 320. 1824, 
Tyre LocaLity: North America. 
RanGE: British America to South Dakota, Utah, and New Mexico. 
New Mexico: Rio Pueblo; headwaters of the Pecos; White Mountains. Wet 
ground, in the Transition Zone, 
61. HYDRANGEACEAE. Hydrangea Family. 
Low or tall widely branching shrubs with opposite branches; leaves opposite, exstip- 
ulate, simple, more or less persistent, entire or toothed; flowers perfect, with mostly 
conspicuous white or yellowish petals, solitary or cymose; calyx of 4 or 5 sepals sur- 
mounting the hypanthium; stamens numerous, the filaments slender or sometimes 
stout, then appendaged; ovary partly inferior; fruit a woody capsule. 
KEY TO THE GENERA. 
Flowers in cymes, very numerous; sepals and petals 5; 
stamens 10. 
Plants large, often 2 meters high; leaves large, 
toothed..........2.-2222---222.200222222----- 1. Epwinta (p. 298). 
Plants small, depressed; leaves small, entire....... 2. FENDLERELLA (p. 299). 
Flowers solitary or in 2 or 3-flowered clusters; sepals and 
petals 4 or 5, usually 4; stamens 8 or numerous 
(15 to 60). 
Filaments appendaged; flowers uniformly 4-parted; 
stamens 8....2.2222.20.. 0002 eee eee 3. FENDLERA (p. 299). 
Filaments not appendaged; flowers occasionally 5- 
parted; stamens 15 to 60..........2......... 4, PHILADELPHUS (p. 300). 
1. EDWINIA Heller. 
A rather large shrub, often 2 meters high, with opposite branches and brownish, 
partly deciduous bark; leaves deciduous, thin, ovate, petiolate, serrate, 10 cm. long 
or less, bright green above, pale or whitish-tomentulose beneath; flowers in crowded 
cymes, white, 5-parted. 
