Hylodesmum nudiflorum |
Hylodesmum glutinosum |
|
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naked tick-trefoil |
point-leaf tick-trefoil |
|
Stems | dimorphic; leafy stems ascending to erect, unbranched, 10–50 cm, glabrous or sparsely pilose; leafless or nearly leafless stems essentially peduncles arising from base of plant, erect, divergent, or spreading, to 70 cm. |
monomorphic; erect, unbranched, 30–80 cm, sparsely to densely patent- to ascending-pilose. |
Leaves | 3-foliolate, 4–7 usually whorled, sometimes scattered on stem; stipules deciduous and rarely observed, linear, 2–2.5 mm; petiole 4.5–12.5 cm; leaflets usually estipellate, rarely partly stipellate, blades with sparsely pilose veins on both surfaces, sometimes glabrate adaxially; lateral blades oblique, nearly as large as terminal; terminal blade rhombic, elliptic, obovate, or orbiculate, 4.5–12 × 3–8 cm, apex acute or short-acuminate. |
usually 3-foliolate, rarely unifoliolate, 6–8 usually whorled medially on stem, often with 1 or 2 alternate leaves proximally, sometimes scattered and alternate; stipules often persistent, subulate to narrowly ovate, 8–12 mm; petiole 6–14.5 cm; leaflets estipellate, surfaces densely pubescent abaxially, sparsely appressed-pubescent adaxially; lateral blades oblique, smaller than terminal; terminal blade broadly ovate, 5–13 × 5–14 cm, apex abruptly acuminate. |
Inflorescences | on peduncle arising from base of plant, branched; rachis white-pilose and uncinate-puberulent; primary bract narrowly ovate to subulate, 5 mm. |
terminal, unbranched or branched; rachis densely uncinate-puberulent and villous; primary bract subulate to narrowly ovate, 5–9 mm. |
Pedicels | slender, 10–25 mm, glabrous. |
stout, 3–8 mm, uncinate-puberulent. |
Flowers | calyx 1.5–2.5 mm, white-puberulent, hairs scattered, long, stiff; corolla usually pink, rarely white, 6–9 mm, keel connate along abaxial margin (enclosing reproductive organs). |
calyx 3–3.5 mm, white-puberulent, hairs scattered, long, stiff; corolla usually pink-purple, rarely white, 5–7 mm, keel connate along abaxial margin (enclosing reproductive organs). |
Loments | 1–4-articulate; segments asymmetrically depressed-obtriangular, 7–12 × 4–5 mm; stipe (5–)10–22 mm, glabrous or glabrate. |
1–4-articulate; segments asymmetrically depressed-obovate, 7.5–11 × 4–7 mm; stipe 4–10 mm, glabrous or glabrate. |
2n | = 22. |
|
Hylodesmum nudiflorum |
Hylodesmum glutinosum |
|
Phenology | Flowering spring–summer(–fall). | Flowering summer. |
Habitat | Deciduous woodlands and borders, ravines, slopes, dry open woods. | Rich woodlands, north-facing slopes, open dry woods and margins. |
Elevation | 50–150 m. (200–500 ft.) | 0–800 m. (0–2600 ft.) |
Distribution |
AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; NH; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; ON; QC |
AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; ND; NE; NH; NJ; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; NB; NS; ON; QC; Mexico (Nuevo León, Puebla, San Luis Potosí) |
Discussion | Flower-bearing stems of Hylodesmum nudiflorum are usually leafless; occasionally one leaf will be present or, very rarely, multiple leaves. Rare plants with a whorl of leaves on flower-bearing stems most often occur after the vegetative stem has been extensively damaged; they superficially resemble H. glutinosum but retain the remainder of the vegetative and reproductive differences. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Desmodium grandiflorum de Candolle, a synonym of D. cuspidatum, has been widely misapplied to this species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Hylodesmum | Fabaceae > subfam. Faboideae > Hylodesmum |
Sibling taxa | ||
Synonyms | Hedysarum nudiflorum, Desmodium nudiflorum, Meibomia nudiflora | Hedysarum glutinosum, Desmodium acuminatum, D. glutinosum, H. acuminatum, Meibomia acuminata, M. grandiflora var. chandonnetii |
Name authority | (Linnaeus) H. Ohashi & R. R. Mill: Edinburgh J. Bot. 57: 180. (2000) | (Muhlenberg ex Willdenow) H. Ohashi & R. R. Mill: Edinburgh J. Bot. 57: 177. (2000) |
Web links |