11. This is a small annual herb producing whitish scaly prostrate stems less than 20 centimeters long. 12. The plant is a perennial herb with clustered or spreading prostrate stems growing from a taproot. 13. This is a mat-forming annual herb producing scaly, reddish green, prostrate stems 10 to 30 centimeters long. 14. This grass is a perennial with erect or prostrate stems that can exceed one meter in length. 15. "Diodella teres " has a thin, erect or prostrate stem rarely up to 65 cm in height. 16. This species is a perennial herb growing prostrate stems on moist ground or floating stems in shallow water. 17. "Harrimanella hypnoides " produces moss-like cushions, about 5 cm high, often of prostrate stems with ascending shoot tips. 18. This plant is a matted, cushion-forming perennial herb with erect or prostrate stems just a few centimeters long. 19. This is a comparatively small shrub with prostrate stems but with upright flowering spikes of rose-scarlet or orangy-pink blooms. 20. Less than an inch long, they profusely cover the wiry, prostrate stems and give the plant a conifer like appearance.