146 PITTONIA. 
longer any room for doubting the validity of both genera. 
In restoring Platystigma it is discovered that this name, 
as Bentham and others following him have employed it, is 
a homonym, the Platystigma of Robert Brown antedating it 
by two years. I therefore assign to Bentham’s Platystigma 
the new name 
HESPEROMECON. 
Low annuals, erect or decumbent, with smallish mostly 
cream-colored flowers on hirsute (rarely hispid) peduncles 
usually elongated much beyond the commonly short leafy 
branches and appearing scapiform. Herbage pale, glaucous, 
never glabrous, though often only sparsely pilose. Leaves 
never rosulate, but often by the shortness of the branches 
appearing in a dense upright tuft; but the internodes some- 
times Bee and the leaves aways opposite or ternate. 
Sepals petals, ezh six, the former always hairy, at least 
at summit. Stamens indefinitely numerous, the inner suc 
cessively a little longer; filaments filiform in the type-species, 
variously dilated in the others, thin and translucent, not 
colored and petaloid. Carpels 3, short and somewhat turgid, 
not twisted. 
Filaments filiform; stigmas short, ovate 4. H. lineare. 
Filaments linear; stigmas long, lance-linear 2. H. affine. 
Filaments elliptical, not longer than the anthers......... 3. H. platystemon. 
operate oblong-linear, longer than the anthers: 
orollas white or cream-color— 
Capsules long, elliptical 4. H. strictum. 
Capsules short, rhombic-obovat 5. H. angustum. 
orollas yellow; SaaS elliptic-oblong. iieis 6. H. luteolum. 
Filaments winged, the wing ther..7. H. paihana 
1. H. LINEARE. Platystigma lineare, Benth. Trans. Hort. 
Soc. n. ser. i. 407; Hook. Icon. i. t. 38, not of Lindl. Bot. 
Reg. t. 1954; of more recent authors in part only. Platy- 
stemon ivari Curran, Proc. Calif. Acad. 2 ser. i. 242, and Pk 
