inflorescence pedunculate, globular |
inflorescence sessile, globular |
inflorescence sessile, elongate |
flowers sessile, not grouped in inflorescences |
inflorescence pedunculate, globular |
flowers sessile, not grouped in inflorescences |
2 rows of hairs on young stems, stem hollow |
2 rows of hairs on young stems, stem massif |
stem hairy, not in rows, stem massif |
stem glabrous |
stem hairy, not in rows |
stem glabrous |