petioles longer or shorter than the blade; cauline leaves elliptic to narrowly ovate, 

 to 14 cm. long and 5 cm. wide, obtuse to acuminate, the lowermost petiolate, 

 becoming sessile toward the inflorescence; flowers paniculately disposed in an 

 ebracteate modified scorpioid cyme, the branches elongating in age; pedicels stri- 

 gose, to 2 cm. long; calyx 2.5-5 mm. long, divided almost to the base; calyx lobes 

 linear to lanceolate, 1-2 mm. wide, acute to obtuse, glabrous or pubescent on the 

 back, strongly ciliate; corolla tube 5-9 (mostly about 6) mm. long, glabrous or 

 pubescent within; corolla limb 4-9 (mostly about 6) mm. long, moderately 

 expanded; anthers 2.5-3 mm. long; filaments 2-2.5 mm. long, glabrous or with 

 spreading hairs; fornices prominent, usually pubescent; style 9-20 mm. long, 

 usually shorter than the corolla; nutlets rugose and papuliferous. 



In the pine-aspen belt in seepage along streams and wet soil about lakes and 

 ponds, wet meadows and thickets and wet cliffs, widespread in the mts. of N.M. 

 and Ariz., June-Sept.; also Colo., Ut. and Nev, 



2. Mertensia ciliata (James) G. Don. 



Stems erect or ascending, to 12 dm. tall, usually with many stems from each 

 rootstock; leaves glabrous or somewhat papillose on upper surface and ciliate on 

 the margins; basal leaves variable, oblong- to lanceolate-subcordate, to 15 cm. 

 long and 10 cm. wide; petioles about as long as blade; cauline leaves lanceolate to 

 ovate, obtuse to acuminate at apex, narrowly cuneate to subcordate at base, the 

 lowermost short-petiolate, the uppermost sessile, often glaucous, thin; inflorescence 

 from axils of leaves, the peduncles elongated with age, in young plants the flowers 

 aggregated at the top of the plant with each peduncle terminated by a modified 

 ebracteate scorpioid cyme or sometimes umbellate; pedicels to about 1 cm. long, 

 glabrous to papillose or rarely with a few short strigose hairs; calyx lobes 1.3-3 mm. 

 long, glabrous on the back, ciliate to papillate on the margins, more or less strigose 

 within, obtuse to acute; corolla tube 6-8 (mostly about 7) mm. long, glabrous or 

 with crisped hairs within; corolla limb 4-10 (mostly about 6) mm. long, moder- 

 ately expanded; anthers 1-2.5 mm. long, about as long as filaments; fornices 

 prominent, glabrous to papillate or pubescent; style about as long as or exceeding 

 the corolla; nutlets rugose or mammillate. 



On wooded slopes, in wet soil about springs and seepage along streams, bogs 

 and wet meadows, in N.M. (Sandoval and Taos cos.), June-Sept.; Mont, to Ore., 



s. to N.M. 



Fam. 115. Avicenniaceae Endl. Black-mangrove Family 



Shrubs or trees of maritime regions; branches and twigs usually terete, nodose, 

 articulate; leaves opposite, thick, persistent, petiolate, extipulate, entire; inflores- 

 cence axillary or terminal, spicate or subcapitate, the axillary ones mostly paired; 

 flowers sessile, perfect, hypogynous, small; sepals 5, nearly separate, ovate, im- 

 bricate, subtended by a false involucre of a scalelike bract and 2 alternate scale- 

 like prophylla slightly shorter than the calyx and imbricate with each other and 

 the sepals; corolla regular, gamopetalous at the base, campanulate-rotate, 4-parted; 

 stamens 4, inserted in the corolla tube, equal or subdidynamous; carpels 2; ovary 

 superior, compound but with a free central often more or less 4-winged placenta; 

 ovules 4, pendent, orthotropous, hanging from the tip of a central columella; fruit 

 a compressed oblique capsule, the exocarp juicy, somewhat fleshy, usually tomen- 

 tulose, dehiscent by 2 valves, usually only 1 -seeded; seeds without a testa; embryo 

 viviparous. 



A single genus. 



1392 



