SPIDERWORT FAMILY 145 



Bracts not broader than the leaves, not strongly gibbous at the base; stem usually 

 over 3 dm. high, branched. 

 Pod densely glandular-pubescent; sepals broadly lanceolate, densely glandular; 

 plant bright green; branches shorter than the stem proper. 2. T. occidentalis. 

 Pod glabrate. pubescent only in lines or at the ape.x. 



Pedicels strongly glandular; pods pubescent in lines; branches almost equalling 



the stem. 3. T. larimiensis. 



Pedicels glabrous or slightly glandular above; pods pubescent only at the apex. 



4. T. universitatis. 

 Sepals glabroxis or nearly so; petals about 10 mm. long; capsule subglobose. 



5. T. scopulorum. 



1. T. bracteata Small. Stem erect, 1-3 dm. high, simple, or sparingly 

 branched, glabrous; leaves linear, 1-2 dm. long, long-acuminate; sepals ovate- 

 lanceolate; corolla about 2.5 cm. broad. Wet meadows: Minn. — Mo. — -Kans. — 

 S.D. Plain — Subinont. 



2. T. occidentalis (Rritton) Smyth. Stem stout, branched, erect, 2.5-4 

 dm. high; leaves narrowly hnear, 2-3 dm. long, attenuate, with rather loose 

 sheaths, glabrous; bracts 5-15 cm. long; sepals ovate-lanceolate, acute, about 1 

 cm. long; petals blue or rose-colored, 12-15 mm. long. Wet meadows: la. — -Mo. 

 — Colo. — -S.D. Plain — Suhmonl. 



3. T. larimiensis Goodding. Stem 3-4 dm. high, branched, erect, glabrous; 

 leaves narrowly linear, 2-3 dm. long, spreading; bracts narrow. 2-3 mm. broad; 

 sepals lanceolate, acute, lQ-12 mm. long; petals dark blue, 15-20 mm. long; fila- 

 ments strongly woolly below. Wet places: Mont. — Colo.— Utah. Plain — Snh- 

 mont. 



4. T. universitatis Cookerell. Stem 3-4 dm. high, branched; leaves 

 ascending, linear, attenuate, 2-3 dm. long; bracts narrower, 1-2 dm. long; sepals 

 narrowly lanceolate, about 1 cm. long, acuminate; petals blue, broadly ovate, 

 acute, 15 mm. long. Scarcel}^ distinct from the preceding. Wet places: Mont. 

 — S.D.— Colo. Plain— Submont. 



5. T, scopulorum. Rose. Stem more or less branched, 3-4 dm. high; leaves 

 erect, 1-2 dm. long, hnear, attenuate; bract narrow, unequal, glabrous; sepals 

 broadly lanceolate, 8 mm. long; petals 1 cm. long or less, blue. Wet places: 

 Ariz. — Utah—Colo. — 'N.M. Son. — Submont. 



2. COMMELINA (Plum.) L. Day-flower, Dew-flower. 



Mostly perennials, with alternate leaves. Bracts usuall}- spathe-like, folded. 

 Flowers irregular, in small cjTnes. Sepals 3, unequal, the larger two more or 

 less united. Petals 3, usuall}' blue, two larger than the third. Fertile stamens 

 3, rarely 2; filaments slender, glabrous; sterile stamens 2 or 3, smaller than the 

 fertile ones. Seeds 2, one above the other, or sohtary. 



1. C. crispa Wooton. Perennial, with tuberous roots; stem 3-8 dm. high, 

 branched, finelj' villous-pubescent above; leaves linear-lanceolate, 3-7 cm. long, 

 4-6 mm. wide; spathe 1.5-2 cm. long, strongly curved, pubescent and bearded 

 at the base; sepals broadly elhptic-rotund, the upper one slightly narrower and 

 half as long; upper two petals broadl}' reniform, 1-1.5 mm. long, bright blue, 

 the third white, lanceolate, 2-3 mm. long; fertile stamens 3; staminodia 3. 

 Sand}' places: Ind. — Xeb. — Colo. — -Ariz. — -Tex. Plain. 



Family 17. PONTEDERIACEAE. Pickerel-weed Family. 



Perennial bog or water plants, with rootstocks and alternate or basal 

 leaves. Flowero perfect, more or le.ss irregular. Sepals and petals each 3, 

 both colored and parti}' united. Stamens 3-6; filaments partly adnate to 

 the perianth. Pistil of 3 united carpels; ovary 3-celled, or by abortion 1- 

 celled. Fruit a many-seeded capsule or a 1-seeded utricle. 



stamens imequal, the 2 posterior ones with ovate anthers, the third with a sagittate 

 anther; capsule incompletely 3-celled; leaf-blades broad, long-petioled. 



1. Heteranthera. 



Stamens all alike; anthers all sagittate; capsule 1 -celled, with 3 parietal placentae; leaf- 

 blades linear, translucent, sessile. 2. Zosterell.^. 



I 



