Sagina, L.

Dillenberger, Markus S. & Kadereit, Joachim W., 2022, The distinction between Sagina apetala and S. micropetala (Caryophyllaceae: Sagineae), their phylogenetic relationships, and a note on the coastal origin of some widespread ruderals, Willdenowia 52 (1), pp. 5-23 : 17

Identification key to annual Sagina -species of Germany

1. Leaves (at least slightly) succulent, upper leaves with a short mucro <0.18 mm long; sepals obtuse; plants in coastal habitats (e.g. salt marshes)......................................... 2. S. maritima

– Leaves never succulent, upper leaves with a longer mucro> 0.2 mm long; outer sepals obtuse, mucronate, acuminate or acute; plants not in coastal habitats.................................... 2

2. Sepals usually glabrous, often with red margin; other traits: sepals often spreading horizontally at fruiting time at least in some flowers, outer sepals usually obtuse or cucullate, sometimes with an incurved mucro; leaves usually ciliate, often beyond their middle; capsule more often broadly ovoid (width> 4/5 of length) than not..................... 3. S. micropetala

– Sepals usually glandular-pubescent (at least at base), usually with white-hyaline margin; other traits: sepals usually appressed to mature capsule, outer sepals often acute and flat, sometimes with an erect mucro; leaves ciliate at base or without cilia; capsule more often narrowly ovoid (width ≤ 4/5 of length) than not............................... 1. S. apetala