31. Growth form is squat and fat, with a definite caudex and without much differentiation between trunk and branches.32. This species has an erect caespitose growth form , and is sometimes referred to as the "'brittle lichen " '. 33. This rapid appearance of so many plant groups and growth forms has been called the " Devonian Explosion ". 34. It is a genus of eight currently accepted species . " Protousnea " species have a fruticose growth form . 35. Members of " Anzia " have a foliose growth form , with a thallus that can anywhere from 2-30 cm wide. 36. "C . vaginalis " usually has a tubular growth pattern, although the magnitude of the current affects its growth form . 37. Both " Almbornia " lichens have a subfruticose growth form , and are characterised by a densely agglutinated, proso plectenchymatous medulla. 38. Each leaf rosette dies after flowering, but the plant lives on because its highly branched growth form consists of multiple rosettes. 39. For example, a herbaceous growth form is much more highly favored in gynodioecious species of Lamiaceae as compared to woody lineages. 40. As it ages the stem becomes increasingly woody and the plant eventually develops a growth form more typical of a tree.
