378 T. S. Brandegee. 
lobes oblong, obtuse, about 2 mm wide; calyx segments ovate-lanceolate, 
3 mm long; bracts shorter, ovate acuminate; anthers subcontiguous, muti- 
cous, one cell very slightly lower than the other: capsule 8—9 mm long: 
the stipe half its length; seeds 4, white, muriculate. 
Mexico: Collected near Ixmiquilpan, Hidalgo, Aug. 1905. No. 1412. 
This species is nearest to C. Pringlei. 
17. Stenandrium verticillatum T. S. Brandegee, l. c., p. 237. 
Many stems from a perennial root, about 7 cm high; stems white- 
pubescent and also bearing white hairs: leaves in two 4-leaved verticels, 
terminal and above the middle of the stem, obovate, attenuate into a 
Short petiole, obtuse, entire, 12—15 mm long, 7—10 mm wide, bearing 
on the veins below and on the margins numerous white hairs: inflores- 
cence terminating the stems and axillary in a short spike from the lower 
verticel; bracts linear-lanceolate, 1—2 mm long, white-hirsute; calyx lobes 
narrow, 5 mm long, ciliate with white hairs; corolla rose-colored; the 
tube about as long as the calyx; the lobes nearly equal in length, 4 mm 
long; the 4 1-celled anthers nearly sessile: capsule oblong, without stipe, 
4-seeded. 
Mexico: Collected on the mesa at El Riego, near Tehuacan, Puebla. 
No. 1238. 
18. Plantago Purpusi T. S. Brandegee, 1. c., p. 238. 
Perennial caespitose, glabrous: leaves leathery, narrowly ovate, attenuate 
to an obtuse tip and to a margined petiole, more or less crenate or crenate- 
dentate, 3—4 mm wide, 1,5—3 cm long including the petiole: bract 
spathaceous entirely enclosing the 4-parted calyx of the solitary flower: 
corolla tubular, 1 cm long, twice the length of the calyx, shortly 4-lobed: 
anthers 4, dorsifixed, much exceeding the corolla, 2-celled, the cells con- 
verging to a pointed apex: ovary superior, 2-celled, 6 ovuled, ovules 
ventrally affixed; stipe of the ovary 2 mm long, becoming 2 cm long 
when in fruit: capsule circumscissile near the middle: seeds brown, 
somewhat irregularly quadrilateral and flattened, peltate; albumen fleshy; 
embryo relatively large, oblong-ovate, the radical short. 
This interesting plantain belongs to the § Plantaginella and is related 
to the one-flowered Andean species of South America. 
Mexico: Collected in wet meadows along brooks and glaciers on 
Ixtaccihuatl No. 1840. 
19. Houstonia gracilis T. S. Brandegee, l. c., p. 238. 
Herbaceous, perennial by filiform rootstocks; stems erect, 15—20 cm 
high, sparingly branched, glabrous: lower leaves ovate, about 6 mm long, 
5 mm wide and less; upper leaves linear-oblanceolate, mucronate, inclined 
to be revolute, slightly pubescent; stipules minute, setiform: inflorescence 
terminating the stems or axillary in few flowered cymes; peduncles 
5—8 mm long; pedicels 3—5 mm long; calyx divisions 1 mm long, lanceo- 
late; corolla funnel form, 4 mm long; tube pubescent within; capsule 
Subdidymous, broader than long, narrowed below, 1,5 mm long, four- 
fifths inferior; seeds nearly flat, minutely scrobiculate. 
