PDF《蝇子草属 ying zi cao shu》

flowers in ± regular terminal dichasia 1. S. linnaeana 7b. Calyx tubular or campanulate in flower;

inflorescence an irregular thyrse composed of unequal cymules, or flower solitary Key

2 5b. Styles 3. 8a. Petals (including limb) together forming a short tube exserted beyond calyx by 1C3 mm ... 49. S. tubulosa 8b. Petal limbs not forming a tube. 9a. Leaves petiolate throughout, usually ± cordate. 10a. Cyme capitate 38. S. capitata 10b. Cymes not capitate. 11a. Leaves ovate to lanceolate;

petal limbs bifid 39. S. seoulensis 11b. Leaves broadly ovate or suborbicular;

petal limbs 4-lobed 40. S. qiyunshanensis 9b. At least distal leaves not petiolate, not cordate. 12a. Seeds with a rim of long protuberances or winged abaxially;

flowers

1 to few. 13a. Seeds with an entire marginal wing. 14a. Plants perennial Key

3 14b. Plants annual 45. S. nana 13b. Seeds with a rim of spinulose protuberances. Flora of China 6: 66C100. 2001. 15a. Flowers in an irregular thyrse, or solitary;

petaline claws auriculate Key

3 15b. Flowers in terminal lax, regular dichasia;

petaline claws not auriculate. 16a. Leaves lanceolate 41. S. salicifolia 16b. Leaves linear. 17a. Calyx narrowly tubular 44. S. tubiformis 17b. Calyx campanulate. 18a. Leaves 2C3.5 cm;

flowers solitary;

petals white 42. S. morrisonmontana 18b. Leaves 5C8 cm;

usually more than one flower in each cyme;

petals pale red 43. S. hupehensis 12b. Seeds without long marginal protuberances or wings. 19a. Flowers in terminal dichasia or monochasia, or solitary. 20a. Plants annual or biennial 47. S. noctiflora 20b. Plants perennial. 21a. Cushion- or mat-forming herbs, usually less than

10 cm tall;

leaves small, 1C3 mm wide;

flower solitary. 22a. Leaves glabrous except for marginal cilia 50. S. davidii 22b. Plants hairy throughout 51. S. gracilenta 21b. Plants taller, not forming cushions;

leaves broader;

1- to many flowered. 23a. Roots fleshy, fasciculate;

inflorescence a many-flowered dichasium Key

4 23b. Roots not as above;

inflorescence 1C3-flowered. 24a. Androgynophore pubescent. 25a. Calyx 2C2.5 cm;

androgynophore 8C10 mm 35. S. incurvifolia 25b. Calyx 1C1.8 cm;

androgynophore 3C6 mm 34. S. subcretacea 24b. Androgynophore glabrous. 26a. Basal rosettelike clusters of sterile shoots absent;

calyx ca.

2 cm or more 36. S. moorcroftiana 26b. Basal rosettelike clusters of sterile shoots present;

calyx less than

2 cm 37. S. karaczukuri 19b. Inflorescence a regular or irregular thyrse composed of dichasial or 1-flowered cymules. 27a. Flowers unisexual (plants dioecious);

calyx less than

6 mm;

plants biennial. 28a. Calyx 4C6 mm;

petals greenish 29. S. otites 28b. Calyx 2C3.5 mm;

petals white. 29a. Calyx hairy;

petaline claws and filaments hairy 30. S. borysthenica 29b. Calyx glabrous;

petaline claws and filaments glabrous 31. S. wolgensis 27b. Flowers bisexual;

calyx usually longer than

6 mm;

plants annual, biennial, or perennial. 30a. Plants annual or biennial. 31a. Calyx tubular in flower;

cymules 1-flowered. 32a. Petals 4-lobed 24. S. quadriloba 32b. Petals with numerous lobes 25. S. suaveolens 31b. Calyx ovoid-campanulate;

cymules many flowered. 33a. Stamens and styles exserted 15. S. koreana 33b. Stamens and styles included. 34a. Androgynophore glabrous;

stalks of cymules very short 26. S. firma 34b. Androgynophore hairy;

at least proximal cymules with prominent stalks, ca. as long as or longer than pedicels. 35a. Calyx densely glandular hairy 28. S. orientalimongolica 35b. Calyx not glandular hairy 27. S. aprica 30b. Plants perennial. 36a. Cymules very unequal;