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from smooth to papillose (with papillae mostly less than 0.1 mm) or denticulate (teeth 0.1+ mm). Vestiture of the sides of the anthers varies from absent

Pseudocampylium, Sanionia, Tomentypnum G. Roth Lars Hedenäs Treatment appears in FNA Volume 28. Treatment on page 263. Mentioned on page 13, 264, 282, 338, 341

P. H. Raven Oenothera sect. Tetranthera P. H. Raven Treatment appears in FNA Volume 10. Herbs usually annual, sometimes perennial, rarely biennial.Leaves

shorter than petals; torus absent; carpels 1–5, distinct, laterally touching, partially adnate to hypanthium, styles 1–5, lateral, distinct, adnate most of length

epidermis adaxially or on both sides, 1 or 2 stereid bands, the abaxial stereid band usually rounded or reniform, guide cells in 1(–3) layers, hydroid strand occasionally

Torrey & A. Gray Epilobium sect. Lysimachion Tausch Treatment appears in FNA Volume 10. Herbsperennial, rarely suffrutescent, with basal rosettes, turions

Flowers mostly bisexual, 1(–2) per frond (rare in many species); sepals absent; petals absent; stamens 1–2; ovaries 1, bottle-shaped, 1-locular, tapering into

triangular, distinct; ovary 1-locular; style short; stigma undifferentiated [2-lobed]. Berries sessile, not explosively dehiscent, 1-colored, smooth or puberulent

Bot. Monogr. 83: 36. 2007. Peter C. Hoch Basionym: Isnardia Linnaeus Sp. Pl. 1: 120. 1753 Synonyms: Gen. Ludwigia [unranked] Isnardia (Linnaeus) Torrey &

W. L. Wagner Ann. Missouri Bot. Gard. 74: 147. 1987 Treatment appears in FNA Volume 10. Herbs annual, biennial, or short-lived perennial; from taproot

3–9 mm (± terete); pappi of (1–)4 scales in 1 series, or of (5–)8 scales in 2, abruptly unequal series, longest scales (1–)2–8 mm. 2n = 12. Generated Map

5; ovary superior, 2–3(–4)-locular; styles (1–)2–3(–4), connate basally to proximally. Fruits drupes; stone 1. x = 12. United States, Mexico, Central America

proximal 1/2 of hypanthium, usually apically woolly, styles 2–5, terminal, distinct or connate 1/2 of length; ovules 2 or 3[or 4] (all but 1 usually aborting)

botanist who collected in the southeastern United States Treatment appears in FNA Volume 7. Treatment on page 485. Mentioned on page 224, 229, 239, 243, 486

Otting Endemic Treatment appears in FNA Volume 17. Treatment on page 603. Mentioned on page 573, 581. Herbs, perennial, 1.8–4(–5) dm; from a woody caudex;

Chamaenerion (Séguier) Tausch Epilobium subg. Chamerion Rafinesque Treatment appears in FNA Volume 10. Herbs, perennial, often clumped, caulescent; from woody caudex

whitish basally, broadly ovate, 3.5–5 × 3–4.5 mm; stamens 1.5–3 mm; filaments 1–2 mm; anthers 0.5–1 mm, dehiscing by means of apical, porelike slits; pistils

only on distal 1/3 with central column disintegrating; pedicellate or sessile. Seeds usually numerous (1–100+ per locule), usually in 1, rarely 2, rows

Larry Hufford Common names: Thurber’s sandpaper plant Treatment appears in FNA Volume 12. Treatment on page 545. Mentioned on page 544. Shrubs, bushy to

Treatment appears in FNA Volume 9. Treatment on page 23. Mentioned on page 20, 24, 27. Herbs, perennial, 5–25 dm; rhizomatous. Stems 1–10, erect, simple,

perennial, subscapose or leafy-stemmed, 1–12 dm, glabrous or hairy; from stout caudices or rhizomatous, fibrous-rooted. Stems 1–5, erect, simple. Leaves winter-persistent

Willdenow Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. 1: 259. 1807. John L. Strother, Mark A. Wetter Common names: Gum-plant resin-weed

to cuspidate, abaxial faces glabrous, resinous. Ray florets 1–7; laminae elliptic, 3–4 × 0.8–1.3 mm. Disc florets 4–8; corollas 4.5–6.5 mm. Cypselae tan

sectionRosa sect. Pimpinellifoliae speciesRosa spinosissima Linnaeus Sp. Pl. 1: 491. 1753. Walter H. Lewis, Barbara Ertter, Anne Bruneau Common names: Burnet

maturity, axes triquetrous. Spikelets 2-2.7 mm. Lower glumes 1.2-1.4 mm; upper glumes 1.1-1.3 mm; lemmas 2.2-2.7 mm, keels not winged, stiffly and sparsely

Senecio fedifolius Rydberg Senecio nephrophyllus Rydberg Treatment appears in FNA Volume 20. Treatment on page 584. Mentioned on page 572, 574. Perennials,

Kochia americana var. vestita S. Watson Kochia vestita Treatment appears in FNA Volume 4. Treatment on page 312. Mentioned on page 309, 311. Illustrator:

Fl. Bor.-Amer. 1: 173. 1832 Synonyms: S. douglasii subsp. menziesii (Hooker) Calder & Roy L. Taylor S. subvillosa Treatment appears in FNA Volume 9. Treatment

bases decumbent, terete or weakly compressed; nodes terete, 1 exserted. Sheaths closed for 1/4-1/3 their length, terete, smooth, glabrous, bases of basal

5–15 × 3–10 cm height 1–1.5 times diam.; branches pubescent. Pedicels 1–3 mm, pubescent. Flowers 2–4 mm diam.; hypanthia hemispheric, 1 mm, abaxial surface

margins entire to rarely crenate, apex sharp-pointed or rounded. Leaves 1.1–2.5cm × 1.25–1.5mm, spiraled and turned upward, flexible; cross section flat, grooved

glabrous. Flowers 7–10 mm diam.; hypanthia campanulate, 1–1.5 mm, surfaces glabrous; sepals triangular, 1–1.5 mm; petals white to cream, orbiculate, 2–3 mm; staminodes

base, (0.5-)1.2-2.4 × 0.3-1(-1.8) cm, thin and flexible, base long-attenuate, margins plane, entire, apex rounded or obtuse; surfaces abaxially dull, smooth

rounded-hexagonal, (10–)15–18 µm wide, 1:1, strongly papillose with 4–5 2-fid papillae. Sexual condition autoicous. Sporophytes exerted. Seta 1–3 cm. Capsule stegocarpic

Whittemore Conservation concernEndemic Treatment appears in FNA Volume 3. Shrubs, evergreen, 0.5-1.5 m. Stems often ± dimorphic, with elongate primary and

petioles 1-5 cm. Leaflet blades thick and rigid; surfaces abaxially dull, papillose, adaxially glossy, green; terminal leaflet stalked, blade 2.6-6.6 × 1.7-4

Pl. 1: 223. 1753. Sergei L. Mosyakin Common names: Mediterranean saltwort Damascus saltwort WeedyIntroducedIllustrated Treatment appears in FNA Volume

bracts 3, scalelike, 1–4 × 0.5–2 mm. Peduncles deflexed, straight, slender, (0.05–)0.1–0.25 cm, glabrous. Involucres turbinate, 1.2–1.6 × 1–1.4 mm, glabrous;

flexuous, thin, strongly papillose. Achenes ellipsoid to obovoid, 1.7–1.8 × 1.1–1.2 mm. 2n = 52. Phenology: Fruiting late spring–summer (late May–mid

ellipsoid or ovoid, sharply 4-angled, 4.5–7 × 1.5–2.5 mm; sessile. Seeds 2–4, yellowish to reddish brown, 1.3–3 × 0.7–1.3 mm. 2n = 14. Phenology: Flowering (Jun–)Jul–Oct(–Nov)