MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 133 
California: Th. Coulter, No. 133; Nuttall; Douglas; Dr. Ruh; C. C. Parry (Mex. 
Bound. Surv.), 1850; 1881; 1888; Hartweg, No. 1714; Dr. Antisell, No. 80; A. Gray, 
1885; Brewer, Nos. 380 and 653, 1860-2; C. G. Pringle, 1882; T. 8. Brandegee, 1888. 
12. Horkelia platypetala Rydberg. 
H. Parryi Greene, Bull. Cal. Acad. 2: 416. 1887. Not H. Bolandert Parry Wats. 
Potentilla Parryt Greene, Pittonia, 1: 102. 1887. 
Greene, Fl. Fran. 1: 67. 
Horkelia platypetala Rydb. Bull. Torr. Bot. Club, 25: 55. 1898. 
ILLUSTRATIONS: PuatE 67, f. 1; dissection of flower, f. 2; pistil, f. 3; stamens, 
f. 4; fruiting hypanthium and calyx, f. 5. 
Caudex branched and spreading, perennial, woody. Stems several, slender, 1-2 dm. 
high, branched, glandular-puberulent. Stipules ovate, often pectinately toothed, 5-8 mm. 
long. Basal leaves very numerous, somewhat villous-puberulent ; leaflets obovate-cune- 
ate, 5-10 mm. long, deeply incised. Stem leaves few and small with 1-5 pairs of leaflets. 
Cyme open with slender branches; pedicels in fruit about 1.5 em. long, recurved. Hypan- 
thium saucer-shaped, about a third as deep as wide, in fruit about 7 mm. in diameter ; 
bractlets lanceolate, much smaller than the ovate-lanceolate sepals. Petals white, obovate- 
to cuneate-oblong, about half longer than the sepals. 
This was deseribed by Professor Greene under the name Horkelia Parryi from speci- 
mens collected by C. C. Parry in 1887. Some specimens from that collection are labelled 
H. Bolanderi Parryi Wats., but the type specimens of the latter collected by Parry in 
1885 belong to another species, differing in the narrower petals and deeper hypanthium. 
H. platypetala has been collected in Amador and Mariposa Counties of California. 
California: C. C. Parry; Mrs. K. Curran, 1886; Congdon, No. 68, 1894. 
§ 3. CAPITATAE. 
13. Horkelia Hendersonii Howell. 
Horkelia Hendersonii Howell, (List of) Howell’s Pac. Coast Plants, Coll. 1887. 
Howell, Fl. N. W. Am. 1: 180. 
InLustTRATIONS: PLATE 67, f. 6; dissection of flower, f. 7; pistil, f. 8; stamens, f. 9; 
fruiting hypanthium and calyx, f. 10. 
Stems from a cespitose thick woody caudex, about 1 dm. high, hirsute-villous, tinged 
with red or purple, simple and few-leaved. Stipules lanceolate, mostly entire. Basal 
leaves numerous; leaflets 5-8 rather crowded pairs, densely grayish-hirsute, in age 
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