210 Rosaceae 
CHAMAEBATIARIA 
Shrubs, less than | m. high (ours), densely much-branched (ours), somewhat stel- 
late-hairy and scurfy. Leaves 2-pinnate or -pinnatifid, 2—4 cm. long (ours); leaflets 
many, small, entire (ours), obovate. Flowers in panicles. Calyx-cup turbinate; seg- 
ments 5, erect. Petals erect, rounded, white (ours). Stamens about 60, on the calyx. 
Pistils 5, somewhat united below; style terminal. Follicles coriaceous. Seeds 4—8, 
terete. (Apparently Gk. chamai—on the ground, batis—=a ray fish; referring to the low 
spreading form.) E. C. millefolium Max. 
HOLODISCUS (Schizonotus, Sericotheca) OCEAN SPRAY 
Shrubs, thornless. Leaves simple, toothed or lobed, deciduous; stipules none. Flow- 
ers in terminal panicles, numerous. Sepals 5, 3-veined, erect in fruit. Petals white 
or pinkish, short-clawed. Stamens about 20. Akenes long-hairy, membranous. Seeds 
broadly oblong. (Gk. holoswhole, diskos—a disk; the disk of the receptacle is entire- 
margined. ) 
4 
A. Leaves grayish- or whitish-tomentose beneath, usually over 3 cm. long, acute to 
truncate at base. W.C.E. (H. ariaefolia.) 
H. discolor Max. 
AA. Leaves not at all tomentose beneath altho somewhat glandular and slightly hairy, 
I1—3 cm. long, cuneate at base. U. C. 
H. glabrescens Hel. 
FILIPENDULA 
Herbs, perennial, with rootstocks. Leaves pinnately dissected; stipules present. 
Flowers in panicle-like or corymb-like cymes. Calyx-cup flat. Petals white (ours) 
Stamens 20—40, 10 shorter. Pistils 5-15, distinct, opposite the petals when of the . 
same number. Akenes attenuate or stalked at base, coriaceous. Seeds terete. (L. 
filum=thread, pendulus—=pendulous; said to refer to the roots. ) (U7 Worl n ow 
F. occidentalis How. (Larmor Co (ni) 
HORKELIA. 
Herbs, perennial, with scaly rootstocks or caudices. Leaves pinnately compound, 
usually with many leaflets. Flowers in cymes or panicles. Calyx-cup deeply campanulate 
to saucer-shaped; segments 5. Petals 5, white or rose or yellow. Stamens 5—20, in 
the throat of the calyx-tube. Filaments filiform, or somewhat petal-like. Receptacle flat 
to conic. Pistils 3 to numerous; styles long, slender, jointed to akene, finally deciduous. 
(Origin?) : 
A. Petals white or rose-colored. 
B. Stipules of the lower leaves not dissected into linear-fliform segments. 
C. Basal leaves with 20-—36 leaflets. U. 
H. sericata Wats. 
CC. Basal leaves with 10-—20 leaflets. 
D. Petals oblong, obtuse at apex. U. 
H. hendersonj How. 
DD. Petals cuneate, truncate to emarginate at apex. 
E. Leaflets cleft from nearly half way to nearly to the base into lanceolate 
to linear segments. C. E. (H. fusca ienella. ) 
H. tenella Rydb. 

