GREENMAN. — GENUS RELBDNIUM. 467 



upper surface and on the prominent midrib beneath, margins ciliate: 

 flowers axillary or terminating the stems and short lateral branchlets : 

 corolla glabrous, greenish white; lobes broadly oblong-ovate, acute: 

 pedicels of the young fruit nearly 2 mm. in length, somewhat thickened, 

 glabrous or sparingly hirsute : immature fruit glabrous, seemingly bac- 

 cate. — Proc. Am. Acad. xi. 74, 115. — Guadalupe Island, off Lower 

 California, Palmer, no. 36. 



■f- ■(- Stems 4-angled. 



24. G-. pubens, Gray. A stout herbaceous perennial : stems 

 apparently becoming somewhat indurated at the base : leaves in fours or 

 rarely in fives, broadly ovate, ovate-oblong or oblong-linear, 5 to 15 mm. 

 long, 2 to 8 mm. broad, acute or shortly subacuminate, hirsute-pubescent 

 on either surface, the scattered hairs of the upper surface often curved 

 or subuucinate, margins slightly hispid: flowers axillary or cymose : 

 pedicels recurved, pubescent: immature fruit minutely pubescent, dis- 

 tinctly baccate: male plants more profusely flowered. — Proc. Am. Acad, 

 vii. 350, Bot. Cah i. 285, & Syn. Fl. N. A. i. pt. 2, 40. —California, 

 Bolander, no. 6346, Torrey, no. 188 ; Lower California, near Enceuada, 

 12 April, 1882, Marcus E. Jones, also from Lower California, collected 

 by OrcuU va 1883, without number. 



§ 4. Species of doubtful affinity. 



25. G-. ? denticulatum, Bartl. Stems diffusely branching, his- 

 pidulous-setose : leaves in fours, ovate, cuspidate, remotely dentate- 

 ciliate, subhirsute upon either surface, 1-nerved: flowers few, termi- 

 nating the stems, usually in threes : pedicels capillary : fruit glabrous ? — • 

 In DC. Prod. iv. 612; Hemsley, Biol. Cent. -Am. Bot. ii. 64. — Mexico, 

 Real del Monte, Hcenhe. Specimens not seen. Description compiled 

 from De Candolle's Prodromus. 



RELBUNIUM, Endl. (Name a Latinization of relbun, which 

 Feuillee states to be the vernacular for a Chilian dye plant, the Relbu- 

 nium hypocarpium of Hemsl.) — Flowers perfect, subtended by a 2-4- 

 bracteate involucre. Calyx-tube globose ; limb obsolete. Corolla rotate, 

 4-Iobed ; lobes valvate. Stamens 4, exserted, adnate to the tube of the 

 corolla; filaments short; anthers dithecous. Ovary 2-celled ; styles 2, 

 free or connate at the base ; stigmas capitate ; ovules solitary in the cells, 

 borne on the dissepiment, amphitropous. Fruit didymous, more or less 

 fleshy or baccate, smooth and glabrous, or hirsute, usually two- or by 

 absorption one-seeded. Seeds concave on the face : embryo curved ; 

 cotyledons foliaceous ; radicle inferior. — Herbaceous perennials having 



