174 VALERIANACE.fi. (VALERIAN FAMILY.) 



5. O. caerftlea. (BLUETS.) Glabrous; steins erect, slender, sparingly 

 branched (3' -5' high); leaves oblong-spatulate (3" -4" long) ; peduncles fili- 

 form, l'-2' long; pod free to the middle; seeds rough-dotted. (2) (Housto- 

 nia caerulea, L. Hedyotis, Hook.) Moist and grassy places ; common. May - 

 Aug. A delicate little herb, producing in spring a profusion of light-blue 

 flowers fading to white, with a yellowish eye. 



O. 8ERPYLLIF6LIA (Houstonia serpyllifolia, Michx.) may probably be found 

 in the high mountains of Virginia; and O. ROTUNDIFOLIA in the southeastern 

 part of the same State. 



SUBORDER HI. LOGANrjE. THE LOGANIA FAMILY. 



7. MITREOLA, L. MITRE-WORT. 



Calyx 5-partcd. Corolla little longer than the calyx, somewhat funnel-form, 

 5-lobed, valvate in the bud. Stamens 5, included. Ovary free from the calyx, 

 except at the base, 2-celled : styles 2, short, converging and united above ; the 

 stigmas also united. Pod projecting beyond the calyx, strongly 2-horncd or 

 mitre-shaped, opening down the inner side of each horn, many-seeded. Annual 

 smooth herbs, with opposite leaves, small stipules between the leaves, and small 

 white flowers spiked along one side of the branches of a terminal petiolcd cyme. 

 (Name, a little mitre, from the shape of the pod.) 



1. HI. petiOlala, Torn & Gray. Leaves thin, oblong-lanceolate, peti- 

 oled. Damp soil, from Eastern Virginia southward. Plant l-2 high. 



8. SPIGEL.IA, L. PINK-ROOT. WORM-GRASS. 



Calyx 5-parted, persistent; the lobes slender. Corolla tubular-funnol-form, 

 5-lobed at the summit, valvate in the bud. Stamens 5 : anthers linear. Style 

 Blender, hairy above, jointed near the middle. Pod short, twin, laterally flat- 

 tened, separating at maturity from the base into 2 carpels, which open loculici- 

 dally, few-seeded. Chiefly herbs, with the opposite leaves united by means of 

 the stipules, and the flowers spiked in one-sided cymes. (Named for Prof. 

 Spigelius, who wrote on botany at the beginning of the 17th century.) 



1. S. RIarilaiidica, L. Stems upright, simple (6' -15' high); leaves 

 Ressile, ovate-lanceolate, acute; spike 3 - 8-fiowered ; tube of the corolla 4 times 

 the length of the calyx, the lobes lanceolate ; anthers and style exserted, 1J. 

 Rich woods, Pennsylvania to Wisconsin and southward. June, July. Corolla 

 1 ' long, crimson outside, yellowish within. A well-known officinal anthel- 

 mintic, and a showy plant. 



ORDER 57. VALERIAN AC Rffi. (VALERIAN FAMILY.) 



Herbs, with opposite leaves and no stipules ; the calyx-tube coherent with 

 the ovary, which has one fertile 1-ovuled cell and two abortive or empty ones ; 

 the stamens distinct, 1-3, fewer than the lobes of the corolla, and inserted 

 on it* tube. Corolla tubular or funnel-form, often irregular, mostly 5- 



