Talk about Psilotopsida

AKA whisk ferns, sporophyte is formed of upright green stems, branched dichotomously, attached by a rhizome (underground stem) with rhizoids. Stems are photosynthetic organs since they have no leaves, they have enations, which are green leaflike veinless, photosynthetic flaps of tissue. Sporangia are trilocular (3 lobes) and are born on the short lateral branches directly on the stems, they are isosporic.