The very smallest and youngest stems sectioned showed never less than three protoxylem groups, while both four and five groups are commonly found in the stems of young prothallial plants. Diphasiastrum tristachyum Pursh Holub, Blue Ground-cedar. In the growing plant new leaves are rapidly developed from the stem-apex, and a stem-axis is formed Fig. The antherozoids are biflagellate. In sub-genus Rhopalostachya also roots are adventitious and arise all along the underside of the prostrate portion of the stem.
Structure of Lycopodium (With Diagram) | Pteridophyta
Campina Grande do Sul, Serra de Capivari, The epidermis is one cell in thickness and has stomata that appear to be similar in structure to those of the leaf. SGO not seen, GH photo! Lycopodiaceae Pteridophyta de la seccion Crassistachys Herter. This distinguishes it from the other plants we have seen so far. These spores will lead respectively to a male and a female gametophyte. The spores, however, are not toxic.
Olympus FluoView Resource Center: Confocal Gallery - Clubmoss Mature Stem
It may be one to two centimentre long or wide and is top shaped, conical or discoid in shape Fig. The outer daughter cells contribute to the formation to the bulk of the sporangium. The relative positions of the foot, stem, first leaf, and first-root rudiments in the young plant of L. However, it cannot be said. The rhizoids develop on the lower surface of the protocorm, the upper surface of the protocorm gives rise a few to many erect, conical outgrowths known as protophylls.
View a smaller version of this digital image. Lycopodine is a poison which causes paralysis of the motoric nerves while clavatine is toxic to many mammals. While it is probably the most common clubmoss species in the state, it is still relatively uncommon. According to Bruchmann , the two cells facing the apical meristem of the prothallus develop into the stem and the two cells facing away from the meristem develop into the cotyledon and the primary root. Strobili erect, sessile or pedunculate, borne on branchlet systems that arise in a dorsolateral position on the main stem; side walls of sporangium epidermis cells sinuate, lignified throughout; spores reticulate subfamily Lycopodioideae. Distribution of alkaloids in the genus Lycopodium.