Helianthemum Miller
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publication ID |
https://doi.org/10.5281/zenodo.293200 |
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persistent identifier |
https://treatment.plazi.org/id/03B0402C-FEF1-E259-F70A-FB78DEE7F55E |
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treatment provided by |
Plazi |
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scientific name |
Helianthemum Miller |
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4. Helianthemum Miller View in CoL 1
Dwarf shrubs or annual herbs. Leaves opposite, decussate, usually stipulate. Flowers in raceme-like cymes, often secund. Sepals 5, the 3 inner ovate, the 2 outer smaller, usually linear or oblong. Petals usually yellow, less often white or pink; stamens numerous, all fertile. Style short and straight or filiform and more or less sigmoid. Capsule ovoid, 3-valved; ovules orthotropous. Literature: E. Guinea, Cistâceas Espaiiolas (Boi. Inst. For. Inv. Exper. Madrid'No. 71) 63-160. Madrid. 1954. 1 Dwarf shrubs 2 All leaves stipulate (stipules occasionally caducous); style slender, filiform, slightly sigmoid at base 3 Leaves and sepals densely covered with peltate scales 2. squamatum 3 Leaves and sepals without peltate scales 4 Inflorescence corymbose 1. lavandulifolium 4 Inflorescence ± simple 5 Outer sepals broadly ovate, reflexed so as to give the villous flower buds the appearance of a cat’s head 3. caput-felis 5 Outer sepals linear to linear-lanceolate, the flower buds not resembling a cat’s head 6 Flowers sessile 7 Branches slender; sepals 3-4 mm in fruit 14. sessiliflorum 7 Branches robust; sepals 5-8 mm in fruit 15. stipulatum 6 Flowers pedicellate 8 Plant glandular-hairy in all its parts 5. viscariura 8 Plant not glandular-hairy 9 Sepals with long, stiff, patent bristles, usually equalling or exceeding the intercostal spaces 10 Intercostal spaces of sepals glabrous and shining 6. asperum 10 Intercostal spaces of sepals stellate-tomentose 7. hirtum 9 Sepals without long, stiff bristles 11 Stipules ± leaf-like, longer than the petioles; stellate hairs (when present) on upper surface of leaf forming a thick felt 12 Upper surface of leaves densely stellate-tomentose 8. croceum 12 Upper surface of leaves glabrous to pubescent 9. nummularium 13 Leaves with strongly revolute margins; capsule much shorter than sepals 4. piliferum 13 Leaves nearly or quite flat; capsule about equalling sepals 9. nummularium 11 Stipules linear, not leaf-like; stellate hairs (when present) on upper surface of leaf closely appressed, scarcely forming a felt 14 Petals yeUow 10. leptophyllum 14 Petals white or pink 15 Sepals pubescent 11. apenninum 15 Sepals glabrous or stellate-tomentose on or between the ribs
16 Petals white; sepals in fruit less than 10 mm
12. pilosum
16 Petals pink; sepals in fruit more than 10 mm
13. virgatum 2 Lower leaves exstipulate (the upper leaves sometimes stipulate); style shorter than stamens, strongly sigmoid at base 17 Flowers solitary or few on long pedicels at ends of leafy shoots 31. lunulatum 17 Flowers in leafless cymes 18 Leaves (at least of non-flowering shoots) densely stellatetomentose beneath 19 Leaves all exstipulate, or upper leaves of flowering shoots with only small stipules
20 Leaves cuneate at base 23. canum
20 Leaves rounded or cordate at base
21 Leaves ovate-orbicular to cordate-orbicular
26. pannosum
21 Leaves ovate to lanceolate, acute
22 Inflorescence simple or branched from base; leaves all exstipulate 25. marifolium
22 Inflorescence usually paniculate; upper leaves of flowering shoots with small stipules 27. cinereum 19 Upper leaves of flowering shoots with conspicuous, leaflike stipules
23 Leaves ± revolute 30. viscidulum
23 Leaves flat
24 Leaves rounded or cordate at base 27. cinereum
24 Leaves cuneate at base 28. hymettium 18 Leaves green on both surfaces 25 Upper leaves of flowering shoots with conspicuous stipules 29. rossmaessleri 25 All leaves exstipulate
26 Leaves elliptical to linear-lanceolate 22. oelandicum
26 Leaves ovate to cordate-orbicular 24. origanifolium 1 Annuals 27 Sepals scarious 21. aegyptiacura 27 Sepals herbaceous 28 Plant viscid; sepals obtuse; pedicels deflexed after anthesis
20. sanguineum 28 Not viscid; sepals acuminate; pedicels erect after anthesis 29 Flowers subsessile; inflorescence dense 30 Bracts shorter than sepals; seeds smooth or foveolate
16. villosum 30 Bracts longer than sepals; seeds covered with crystalline papillae 17. papillare 29 Pedicels 2-12 mm; inflorescence lax 31 Pedicels erect, shorter than the sepals 18. ledifolium 31 Pedicels patent, arcuate-erect at apex, exceeding the sepals
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